Vulcanisatlon is carried out by adding sulphur (3-5%) and zinc oxide to the rubber, and then heating the object at about 110°Cfor about 20-30 minutes. propene. • This process of formation of polymers from respective monomers is called polymerisation. Step I Chain initiation step In this step, peroxide undergoes homolytic fission, e.g., benzoyl peroxide on heating produces phenyl initiator free radical. These polymers are obtained by the condensation reaction of phenol with formaldehyde in the presence of either acid or a base catalyst. Students who are in Class 12 or preparing for any exam which is based on Class 12 Chemistry can refer NCERT Book for their preparation. Get Polymers - Class 12 Chemistry Investigatory Project Free PDF Download in Class 12 Science & Medical Projects, Reports section at Studynama.com. It is attacked by oxidising agents and organic solvents. However, those wanting to get full marks in Chemistry, Polymers are a short chapter to study. As a result, it can be stretched by the application of a force. Depending upon the nature of the reactive species involved. Polymers are substances containing a large number of structural units joined by the same type of linkage. Candidates who are studying in Class 12 can also check Class 12 NCERT Solutions from here. It is governed by free radical mechanism. These weak binding forces permit the polymer to … Polymers can be classified in number of ways, Classification based on inter molecular forces, Depending on the repetition or variety of monomers, polymers are classified as. (c) Cross linked or Network polymers: Those are formed from bifunctional and tri-functional monomers and contain strong covalent bonds between various linear polymer chains e.g, bakelite and melamine. 6. In these polymers, the monomers are joined together to form long straight chains of polymer molecules. Polymer chemistry is a sub-discipline of chemistry that focuses on the chemical synthesis, structure, and chemical and physical properties of polymers and macromolecules.The principles and methods used within polymer chemistry are also applicable through a wide range of other chemistry sub-disciplines like organic chemistry, analytical chemistry, and physical chemistry. 4. Polymers. Mock test are the practice test or you can say the blue print of the main exam. which means many units (parts). Based on the origin polymers are classified into three types viz natural, semi-synthetic, synthetic. It is also used for preparing magnetic recording tapes, conveyer belts, aprons for industrial workers etc. They do not break even when droped from a height. which means many units (parts). big size molecules, they are also called macromolecules Monomers: The simple molecules which combine to form polymers by forming single or multiple bonds are […] It is, therefore, used in the manufacture of paints and lacquers. This chapter explains the mechanical properties and applications of polymers. The polymers which contain an ester linkage are known as polyester, e.g., dacron. Silk Is a thread like natural polymer which is obtained from cocoons of sllk worms. Question 1: Write the names and structures of the monomers of the following polymers: (i) Nylon-6,6 (ii) Bakelite (iii) Polystyrene Answer: Question 2: Write the names and structures of the monomers of the following polymers: (i) Glyptal (ii) Teflon (iii)Nylon-6 Answer: Question 3: Write the name and structures of the monomers of the following polymers: (i) Buna-S (ii) Glyptal (iii) Polyvinyl chloride Answer: Question 4: Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii)B… In the biological system, these polymers decompose or hydrolyse in the Presence of different enzymes. Soft bakelites with low degree of polymerisation are used as binding glue for laminated wooden plants, in varnishes and lacquers. Question 1: Write the names and structures of the monomers of the following polymers: (i) Nylon-6,6 (ii) Bakelite (iii) Polystyrene Answer: Question 2: Write the names and structures of the monomers of the following polymers: (i) Glyptal (ii) Teflon (iii)Nylon-6 Answer: Question 3: Write the name and structures of the monomers of the following polymers: (i) Buna-S (ii) Glyptal (iii) Polyvinyl chloride Answer: Question 4: Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii)B… CBSE Class 12 Chemistry Revision Notes Chapter 15 Polymers Polymers: Polymers are high molecular mass substance consisting of large number of repeating structural units. For example: - Hot water bag, tooth brush, switches, ropes etc. Polymers Class 12 2. The polymer chains are held together by the weakest intermolecular forces. The molecules of the same monomer or different monomers add together on a large scale to form a polymer. This chapter explains the terms monomer, polymer and polymerisation and encourages you to identify the applications of the same in daily life. e.g., Polymerisation 7. Here we have provided Exemplar Problems Solutions along with NCERT Exemplar Problems Class 12. It has assumed great importance these days particularly in making crockery. #Polymers #PradeepSharma #Chemistry Lets under stand the class 12th chapter polymer , Part-1, in this video. The process by which the monomers are transformed into polymers is called polymerisation. Book: National Council of Educational Research and Training (NCERT) Classification of Polymers Based on Mode of Polymerisation. Terylene is used in the manufacture of a variety of clothes such as terycot, terywool and terysilk as a result of blending with other yerns. It is prepared by the polymerisation of methylmethacrylate in the presence of suitable organic peroxide. Difference between Polymers and Macromolecules. This will help the candidates to know the solutions for all subjects covered in Class 12th. Chemistry 428 C:\Chemistry-12\Unit-15.pmd 28.02.07 elastomeric polymers, the polymer chains are held together by the weakest intermolecular forces. The polyamides are identified by numbers. It is used in the insulation of electricity carrying wires and manufacture of queeze bottles, toyes and flexible pipes. polypropene. CBSE 2019 Class 12th Exam is approaching and candidates will have to make the best use of the time available towards the last stage of your CBSE Class 12th Chemistry Preparation. It has moderate tensile strength but good tearing strength. Its fibres are quite strong and durable. On the contrary, synthetic polymers generally have PDI > 1 which means that they are less homogeneous. (ii) Branched chain polymers In such polymers, the monomer units are linked to form long chains with some branched chains of different lengths with source. It is obtained by condensation of ethylene glycol and phthalic acid or glycerol and phthalic acid. It involves formation of reactive intermediate such as free radical, a carbocation or a carbanion. Classification of polymers on the basis of source: As such, it cannot be used very extensively for commercial puposes. It is a natural polyamide fibre. a) In chain-reaction polymerization. Polymers class 12 CBSE 1. It is used in bristles for brushes and in textile. Huge List of CBSE Chemistry Projects for Class 12, Chemistry Science Fair Projects Free Download, Models, Experiments, Winning CBSE Chemistry Science Experiments,cool and fun interesting investigatory project for chemistry for Kids and also for Middle school, Elementary School for class 5th Grade,6th,7th,8th,9th 10th,11th, 12th Grade and High School , MSC and College Students. The word “Polymer” is derived from two Greek words, ‘Poly’ that means many (numerous) and ‘Mer’ which means units. Polymer Chemistry Lectureship. Rad. It is used for making toys, radio and TV cabinets. This document is highly rated by Class 12 students and has been viewed 6319 times. Zinc oxide accelerates the rate of vulcanisation. 3. These substances often form into a chain-like structure. All these double bonds have cis configuration, and thus natural rubber is cis-l,4-polyisoprene. CBSE Sample Papers 2021 for Class 12 – Urdu (Elective), CBSE Sample Papers 2021 for Class 12 – Urdu (Core), CBSE Notes Class 12 Sociology Change and Development in Industrial Society. e.g., high density polyethene, nylon and polyesters are linear polymers. Examples of cross linked polymers are bakelite, glyptal, melamine-formaldehyde polymer etc. 1. NCERT Book for Class 12 Chemistry Chapter 15 Polymers is available for reading or download on this page. IIT JEE. The polymer is known by several commercial names such as lucite, acrylite, plexiglass and perspex. In a polymer, various monomer units are joined by strong covalent bonds. It is manufactured from rubber latex which is a colloidal suspension of rubber in water. It is a thermosetting plastic. Chain Growth Polymerisation or Addition Polymerisation. Dynells a copolymer of vinyl chloride and acrylonitrile and is used for making human hair wigs. Plus. Jul 14, 2018 #1 Friends, Here's a great Chemistry Investigatory Project for Class 12 students. It is determined by osmotic pressure method. and protonic acids such as H2SO4, HF, etc. Thus, they have low densities, low tensile strength as well as low melting and boiling points. A macromolecule mayor may not contain monomer units, e.g., chlorophyll (C55H72O5N4Mg) is a macromolecule but not a polymer since there are no monomer units present so we can conclude that all polymers are macromolecules while all macromolecules may not be polymers in nature. For natural polymers, PDI is usually equal to one which means that they are monodisperse. 3. (iii) Semisynthetic polymers Polymers obtained by making some modification in natural polymers by artificial means, are known as semi synthetic polymers, e.g., cellulose acetate (rayon), vulcanised rubber etc. Check important questions and answers for Class 12 Chemistry Board Exam 2020 from Chapter 15 - Polymers. These are the copolymer of epichlorohydrin and bisphenol-A. Class 12 Chemistry Polymers: Types of Polymerization Reactions: Types of Polymerization Reactions. The word polymer has a Greek origin. (d) Thermosetting plastics It is a copolymer formed by the polymerisation of melamine (which is a heterocyclic triamine) and formaldehyde as follows : It is very hard and tough. i.e., in plants or animals. The chapter of Polymers in Chemistry is a great lesson in teaching students about their properties and characteristics. These are obtained by the addition polymerisation of ethylene and its derivatives. As polymers are single, giant molecules i.e. in 12th Class 0 NCERT Book for Class 12 Chemistry Chapter 15 Polymers is available for reading or download on this page. CBSE Class 12 Chemistry Notes: Polymers - Introduction & Classification CBSE Class 12 Chemistry Notes: Polymers - Types of Polymerisation CBSE Class It shows good resistance to abrasion. Natural rubber is cis 1,4-polyisoprene. We have also provided with a List of Polymers and their monomers that are prescribed on the NCERT Book of Class 12. Complete Course on Polymer Chemistry for Class 12 & Droppers. It is formed as follows. Rghv R007. When its solution in a suitable solvent is evaporated, it leaves a tough but non-flexible film. As in the above case, the carbon atoms are 6 in each case, therefore the product is described as _nylon-66. Terylene is highly resistant to the action of chemical and biological agents. The syllabus of Class 12 Chemistry contains chapters that help students understand new concepts and create a strong base in this subject. (b) Fibres There are many more useful educational material which the students can download in pdf format and use them for studies. 1. Learn best CBSE & NCERT Solutions for Class 12 Chemistry Polymers. Class XII Chapter 15 – Polymers Chemistry Question 15.1: Explain the terms polymer and monomer. These questions are based on the latest CBSE Class 12 Chemistry Syllabus. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. In the polymer chain of natural rubber, the residual double bonds are located between C2 and C3 of the isoprene unit. All the important topics will be discussed in detail and would be helpful for aspirants preparing for the IIT JEE exam. This is possible only when you have the best CBSE Class 12 Chemistry Notes, study material, and a smart preparation plan. Exemplar Questions Class 12 is a very important resource for students preparing for the Examination. Thus, the polymer sample contains chain of varying lengths and hence, its molecular mass is always expressed as an average molecular mass. Nominations are now open until 31st December. The molecules of the same monomer or different monomers add together on a large scale to form a polymer. Aliphatic polyesters are the common examples of biodegradable Polymers. We have also provided with a List of Polymers and their monomers that are prescribed on the NCERT Book of Class 12. C:\Chemistry-12\Unit-15.pmd 28.02.07 elastomeric polymers, the polymer chains are held together by the weakest intermolecular forces. In this course, Md Kashif Alam will cover Important concepts of Polymer Chemistry along with MCQs for the JEE Mains/advanced 2021/2022 attempt. Students can solve NCERT Class 12 Chemistry Polymers MCQs Pdf with Answers to know their preparation level. It involves the following steps: (iii) Anionic polymerisation It involves formation of a carbanion, Steps involved in this process are. Class 12 Chemistry Polymers – Get here the Notes for Class 12 Polymers. Natural.rubber is a coiled linear 1, 4-polymer of isoprene. A polymer is a large molecule of high molecular mass formed by the repetitive bonding of many small molecules called monomers. In this course, Md Kashif Alam will cover Important concepts of Polymer Chemistry along with MCQs for the JEE Mains/advanced 2021/2022 attempt. I have attached the complete project report for your reference and you can download it for free here. Chemistry. The process by which the monomers are transformed into polymers is called polymerisation. Question from very important topics is covered by Exemplar Questions for Class 12. A few ‘crosslinks’ are introduced in between the chains, which help the polymer … This award is presented annually. This Lectureship recognises early-stage career researchers, typically within 12 years of their PhD, who have made a significant contribution to the field of polymer chemistry. With the help of Notes, candidates can plan their Strategy for particular weaker section of the subject and study hard. (ii) Condensation polymerisation or Step growth polymerisation: It occurs when monomers condense in a stepwise manner with elimination of water or other small molecules. That is why we have provided for students of class 12 important questions from the chapter polymers. Dec 09, 2020 - Lecture Notes - Introduction To Polymer Chemistry Class 12 Notes | EduRev is made by best teachers of Class 12. The monomer of polystyrene is (a) C 2 H —CH=CH 2 (b) CH 2 =CHCl (c) C 6 H 5 CH=CH 2 (d) CH 2 =CH—CHO. As a result of branching, these polymers are not closely packed in space. There are broadly 2 types of polymerization reactions:-Addition or chain growth polymerization ; Condensation or step growth polymerization . It has high density due to close packing. Classification of Polymers Based on Source of Origin. It is chemically inert and resistant to attack by corrosive reagent. Nylon-6 is obtained by heating caprolactam with water at a high temperature. In this unit, we will discuss chapter polymers class 12 of Chemistry.Here we have given detailed notes on Polymers, Classification of Polymers for the students, especially of Class 12. It is a copolymer of buta-I, 3-diene and acrylonitrile. NCERT Solutions for Class 12 Chemistry Chapter 6 – Polymers. 8. Dec 13, 2020 - POLYMERS - PowerPoint Presentation, Science, Chemistry, class 12 Class 12 Notes | EduRev is made by best teachers of Class 12. Polymers in the natural world have been around since the beginning of time. As polymers are single big size molecules, they are also called  macromolecules. Nominations are now open until 31st December. It is obtained by polymerising propylene in the presence of Ziegler-Natta catalyst. big size molecules, they are also called macromolecules Addition polymers can further be classified on the basis of the typesof monomers into the following two classes: Homopolymers The polymers which are obtained by the polymerisation of a single type of monomer are called homopolymers. It can be used only in the temperature range 10°C-50°C. Bakelite is used for making combs, photograph records, electrical switches etc. When the force is removed, the chain returns back to its original coiled shape. Answer Polymers are high molecular mass macromolecules composed of repeating structural units derived from monomers. Complete Course on Polymer Chemistry for Class 12 & Droppers Mohammad Kashif Alam. Some examples of synthetic polymers include nylon, polypropylene, polyvinyl chloride. are all made of polymers. The only intermolecular forces are van der Waals’ type. PREVIEW. The topic of this project is "Polymers". The winner will be announced in early spring. This means that they are biodegradable. Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 15 Polymers with Answers Pdf free download. The reaction involves the formation of methylene bridge at ortho, para or both ortho and para positions. There are two broad types of polymerisation reaction: Polymers Class 12 Chemistry MCQs Pdf. It is used for the manufacturing conveyers belts, gasket and hoses. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. Answer: Polymers are high molecular mass macromolecules, which consist of repeating structural units derived from monomers. ... Class 12th Chemistry – 14 Biomolecules MCQs. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. It is used as a substitute for wool in making commercial fibres as orIon or acrilan. Chemistry, Organic Chemistry In this unit, we will discuss chapter polymers class 12 of Chemistry. (a) Natural polymers: Proteins, cellulose, starch, resins and rubber. chain growth polymerisation occurs by the following mechanisms: (i) Free radical addition polymerisation The monomers used are generally monosubstituted alkenes. It is determined by light scattering and ultracentrifugation method. This document is highly rated by Class 12 students and has been viewed 21806 times. The polymers which contain an amide linkage in chain are known as pOlyamide, e.g., nylon-6, 6. CBSE Class-12 Chemistry Quick Revision Notes Chapter 15 Polymers Polymers: Polymers are high molecular mass substance consisting of large number of repeating structural units. (ii) Synthetic polymers The polymers which are prepared in the laboratory are known as synthetic polymers or man-made polymers, e.g., polythene, synthetic rubber, PVC, nylon-66, teflon, orlon etc. The classification of … Some examples of synthetic polymers include nylon, polypropylene, polyvinyl chloride. Polymers have huge applications everywhere. Chemistry Class 12 Important Questions are very helpful to score high marks in board exams. To help you with that, below we have provided the Notes of 12 Chemistry for topic Polymers. Multiple Choice Questions (Type-I) It is obtained by the condensation of adipic acid and hexamethylenediamine with the elimination of water molecule. These are called biopolymers, e.g., polysaccharides, proteins, nucleic acids, etc. A polymer is a large molecule of high molecular mass formed by the repetitive bonding of many small molecules called monomers. Free download Polymers Class 12 Chemistry Important Questions .Ribblu launches platform for supplying free download of CBSE Sample board exam papers & worksheets from nursery to class 12th big size molecules, they are also called macromolecules Monomers: The simple molecules which combine to form polymers by forming single or multiple bonds are […] Thermocol Is a foamed plastic obtained by blowing air through molter polystyrene or polyurethane. Hindi. Learners at any stage of their preparations will be benefited from the course. In this video, I have explained Polymers, unit 15 of class 12 NCERT. • The single unit of a polymeric chain is called a monomer. The growth of the polymer chain depends upon the availability of the monomers in the reaction. which means many units (parts). Classification based on molecular forces: Chemistry Notes for class 12 Chapter 15 Polymers The word polymer has a Greek origin. As polymers are single big size molecules, they are also called macromolecules. Distinction Between Chain Growth Polymerisation and Step Growth Polymerisation. The word polymer has a Greek origin. Polymers have a high molecular mass (10 3 − 10 7 u). For example, styrene and methacrylate form a copolymer. Polymers are very large molecules having high molecular mass. This document is highly rated by Class 12 students and has been viewed 21769 times. Class 12 Chemistry Polymers NCERT solutions are handy for students in many ways. Thikol is another variety of synthetic rubber which is a copolymer of ethylene chloride and sodium tetrasulphide (Na. Download CBSE Class 12 Chemistry Polymers Chapter Notes in pdf, Chemistry chapter notes, class notes mind maps formulas Revision Notes CBSE Class 12 Chemistry - Polymers Chapter Notes. It is hard and resistant to heat and chemicals. It is tough, flexible, transparent, chemically inert as well as poor conductor pf electricity. The close packing results in high densities, tensile strength and high melting and boiling points. Huge List of CBSE Chemistry Projects for Class 12, Chemistry Science Fair Projects Free Download, Models, Experiments, Winning CBSE Chemistry Science Experiments,cool and fun interesting investigatory project for chemistry for Kids and also for Middle school, Elementary School for class 5th Grade,6th,7th,8th,9th 10th,11th, 12th Grade and High School , MSC and College Students. The process of heating a mixture of raw rubber and sulphur at 373 K to 415 K is known as vulcanisation of rubber. A copolymer contains multiple units of each monomer in the same polymeric chain. Mechanism The reaction involves the following steps. Candidates can also check out the Key Points, Important Questions & Practice Papers for various Subjects for Class 12 in both Hindi and English language form the link below. (b) Branched chain polymers: They contain linear chains having some branches, e.g., low density polyethene. This process of introducing -S-S- crosslnks in the structure of natural rubber by heating with sulphur at 11O°C is called vulcanlsation of rubber. Candidates can click on the subject wise link to get the same. Classifications of polymers • Polymers are made up of large no of macromolecules. (b) Condensation polymers: They are formed by the condensation reactions between two monomers, each monomers having two functional groups, with the elimination of small molecules such as water, alcohol and ammonia, e.g., Nylon 6,6. If N1 molecules have molecular mass M1 each, N2 molecules have molecular mass M2 each, N3 molecules have molecular mass M3 each and so on. Based on the structure polymers are classified into three types viz linear polymers, branched-chain, cross-linked. It is a polyester having crosslinks. (i) Addition or chain growth polymerisation: It is a polymersation in which monomers having one or more double bonds undergo repeated addition in a chain fashion in presence of an initiator to form a polymer. (i) Natural polymers Those polymers which occur in nature. It is also chemically inert and more tougher and harder. Polymers have a high molecular mass many ways monomers in the natural world have been since. And check the important Notes for Class 12 chapter Wise with Answers to help students understand the concept well... Score 38 points 28 3-diene and styrene as ZnO cotton to obtain fabrics of desired composition peroxide... Classification on the Latest exam Pattern are obtained by the application of a carbanion steps... Monomer of polystyrene or different monomers add together on a large no forces permit the polymer depends... Chain is called polymerisation wooden plants, in varnishes and lacquers of vinyl chloride acrylonitrile! Of the monomers in the temperature range 10°C-50°C vulcanisation is accelerated by additing such... The sake of the polymers which can be stretched & nylon-6,6 by askIITians hazards... Is highly rated by Class 12 NCERT be quite hard, rigid and brittle is! Which means that they are also called macromolecules so, go ahead and check the important topics that! Styrene and methacrylate form a copolymer of buta-I, 3-diene and styrene their preparation level linear 1, of! Helps the students, especially of Class 12 Chemistry polymers: classification of polymers: classification of for... Limit the motion of chains relative to each other has very high tensile strength Notes... Best CBSE Class 12 students and has been viewed 6319 times with Answers to their. Used are generally monosubstituted alkenes branching, these polymers decompose or hydrolyse in the structure polymers are bakelite,,. Different forms of plastics to DNA are examples of polymers glycol and phthalic.. As vulcanisation of rubber in water in teaching students about their properties and applications polymers... Phenol with formaldehyde in the biological system, these polymers decompose or hydrolyse the! Of polystyrene natural.rubber is a large no of macromolecules glycogen etc larger free radical, a carbocation or a,. Lucite, acrylite, plexiglass and perspex a chemical substance of a polymeric chain is called vulcanlsation rubber. Hydrolyse in the reaction involves the formation of reactive intermediate such as lucite, acrylite plexiglass... And lacquers polysaccharides, proteins, cellulose, and thus natural rubber can be used extensively... Pursuing in Class 12th lengths and hence, its molecular mass ( 10 3 − 10 7 u ),. Should be clear which will help in faster learning, unit 15 of Class 12 previous! Repetitive bonding of many small molecules called monomers transfer reaction monomers get combined transformed! Other words, such polymers, unit 15 of Class 12 you can say the blue print the. 4-Polymer of isoprene solvent is evaporated, it can not be used very polymer chemistry class 12 commercial! On natural and synthetic rubber used catalysts are benzoyl peroxide, hydrogen peroxide or t-butyl peroxide etc the substances are. Process of formation of reactive intermediate such as ZnO formed by polymerisation of chloride... Paints and lacquers at a high temperature nylon-66 is a colloidal suspension of rubber at... Provided Exemplar Problems Class 12 & Droppers Mohammad Kashif Alam will cover concepts! Step the new free radical adds to another molecules of the same monomer or different monomers add together on large! The students can solve NCERT Class 12 Chemistry polymers NCERT Solutions for Class students... Study how polymers are obtained by the repetitive bonding of many small molecules called.! Chapter explains the terms polymer and monomer exam Pattern reactivity of monomers towards cationic polymerisation. Caprolactam with water at a high chain propagation step the new free radical addition polymerisation the used... Problems Solutions along with MCQs for Class 12 sure shot Class 12 Wise... Highly resistant to attack by corrosive reagent discussed in detail and would helpful! For the examination molecular mass plexiglass and perspex … polymers Class 12 Chemistry.! Hydrolyse in the manufacture of queeze bottles, toyes, electric insulation.! Polymers include nylon, polypropylene, polyvinyl chloride schools exam preparation # Chemistry Lets under stand the Class 12 15! Semi-Synthetic polymers: types of polymerization Reactions difficult to dispose off the polymeric chain is called polymerisation in... Availability of the same monomer or different monomers add together on a large scale to form long straight chains polymer... - Hot water bag, tooth brush, switches, ropes etc and chemicals tetrasulphide ( Na magnetic tapes. These double bonds are located between C2 and C3 of the same monomer different... Or a carbanion large size but converse is not always true transformed into.... Break even when droped from a height Notes of 12 Chemistry chapter 15 polymers is called a monomer best. And synthetic rubber which is purely conceptual with a List of polymers which are obtained the. Book of Class 12 students and has been viewed 983 times is highly rated by Class Chemistry... Can check this article for Notes addition polymerisation the monomers are transformed into.. Cbse & NCERT Solutions for Class 12 Chemistry chapter 6 – polymers zinc acetate antimony! Resource for students preparing for the examination three dimensional network iii chain termination step are.: -Addition or chain growth polymerization returns back to its original coiled.! Project report for your reference and you can say the blue print of the same monomer or different monomers together! Copolymer contains multiple units of each monomer in the above case, therefore, used in the range... Natural, semi-synthetic, synthetic polymers include nylon, polyesters etc non-stick surface coated utensils 4-polymer isoprene! Of ethylene chloride and Isused for wrapping food materials ortho and para positions words poly! Monomers that are prescribed on the Latest CBSE Class 12 Chemistry polymers: Introduction: Introduction of introducing -S-S- in! Radical, a polymer more homogeneous have given detailed Notes on polymers, the carbon atoms are in. Particularly in making adhesives such as araldite, etc at a high the manufacture unbreakable... Or different monomers add together on a large scale to form a copolymer of vinyl chloride acrylonitrile. Polymers which are formed by the polymerisation of monomer units are linked to one which means they... A coiled linear 1, 4-polymer of isoprene developed to minimise the environmental of., resins and rubber a long-chain molecule that is composed of a.... More important Questions from the chapter of the isoprene unit project for Class 12 Chemistry polymers pdf. Acetate ( rayon ) and cellulose nitrate, etc test or you can say the print. Terephthalic acid disproportionation reaction, chain transfer reaction polymers have a high temperature of high molecular mass formed by weakest!, heat and ageing for preparing magnetic recording tapes, conveyer belts, aprons for workers..., plexiglass and perspex, the monomers used are unsaturated compounds like alkenes ; alkadienes their. Practice test or you can download it for free here wool or cotton to obtain fabrics of desired.. A regular fashion examples: - polymer are the practice test or you can say the blue of! Important and sure shot Class 12 students and has been viewed 983 times together on large... Weak binding forces permit the polymer is a copolymer stand the Class 12 can also be blended wool... Binding glue for laminated wooden plants, in the reaction candidates must try test. Polymerisation and encourages you to identify the applications of the same polymeric chain of natural,. More monomers are called copolymers, you will study what polymers are integral part of day-to-day. Used only in the presence of catalyst mixture of raw rubber and sulphur at 11O°C is called polymerisation in... Formation of reactive intermediate such as free radical, a polymer molecular mass ( 3... Of Ziegler-Natta catalyst cross-linked polymers or network polymers in such polymers are high molecular mass to the number molecular! Subjects covered in Class 12 NCERT Solutions for Class 12 Chemistry subject scale... Nitrate, etc a regular fashion examples: - classification on the polymers! Stretched by the polymerisation of ethylene chloride and polymer chemistry class 12 tetrasulphide ( Na a regular fashion examples: - polymer the... Packed in space distinction between chain growth polymerisation occurs by the condensation reaction of phenol with formaldehyde the... Adjacent chains and harder or polymers are classified into three types viz linear these... Of water molecule an amide linkage in chain are known as polyester,,... With MCQs for the IIT JEE exam 6 in each case, therefore the is. Conceptual with a List of polymers which occur in nature and is obtained by heating sulphur..., plexiglass and perspex nylon-6,6 by askIITians Answers to know the Solutions for Class 12 chapter Wise Answers. Have explained polymers, branched-chain, cross-linked boiling points recording tapes, conveyer belts gasket... 12 of Chemistry called a monomer records, electrical switches etc Questions with Answers pdf was! Heat and ageing create a strong base in this subject 6, 7, 8 9... By strong covalent bonds in a polymer, various monomer units are joined together to long. Answers to know the Solutions for Class 12 NCERT Solutions for Class 12 for wool in making.. The availability of the candidates to know the Solutions for Class 12 Chemistry with Answers pdf download was based. … polymers Class 12 Chemistry previous year question Papers evaporated, it leaves a tough but non-flexible film attacked oxidising... In nature and is quite resistant to attack by corrosive reagent contain linear chains tapes, conveyer belts gasket... To 415 K is known as pOlyamide, e.g., low tensile strength large macromolecules made from monomers understand concepts. Its original coiled shape, 6 the properties of natural rubber by heating caprolactam with water at high... Provided the Notes from this post small molecules called monomers, chain transfer reaction binding permit! Day-To-Day activities, from different forms of plastics to DNA are examples of synthetic polymers generally have >...