Advanced Study Material for Class 12 Chemistry: Unit 15 Polymers
Explore structured advanced study materials through the CBSE Class 12 Chemistry Polymer Exam Notes. Tailored for Class 12 learners, utilizing these Chemistry resources ensures thorough preparation and strengthens foundational knowledge before final CBSE evaluations.
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CBSE Class 12 Chemistry Polymer Exam Notes. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.
1.Polymers are high molecular mass substance consisting of large number of repeating structural units. As polymers are single, giant molecules i.e. big size molecules, they are also called macromolecules
2.Simple molecules which combine to form polymers are called monomers
3.Process of formation of polymers from respective monomers is called polymerization Classification Based On
1.Source of availability
(i) Natural Polymers: Polymers obtained from nature, mostly plants and animals.
Examples: Cellulose, Starch etc.
(ii) Synthetic Polymers: Polymers prepared in laboratory.
Examples: Teflon, Nylon 6, 6, Syntehtic rubber (Buna-S) etc.
(iii) Semi Synthetic Polymer: Polymers derived from naturally occurring polymers by carrying out chemical modifications.
Examples: Rayon (Cellulose acetate), Cellulose nitrate, etc.
2.Structure of Polymter
(i) Linear Polymers: Polymer consist of long and straight chains.
Example: High density polythene, polyvinyl chloride, etc.
(ii) Branched Chain Polymers: Polymers contains linear chains having some branches.
Examples: Low density polythene.
(iii) Cross linked or network polymers: Polymers in which monomer units are cross linked together to form a 3 dimensional network polymers.
Examples: Bakelite, Melamine, etc.
3.Mode of Polymerisation:
(i) Addition Polymers: Polymers are formed by the repeated addition of monomers with double and triple bonds.
(a) Homopolymers: Polymers formed by the polymerisation of a single monomeric species.
Examples: Polythene, Polystyrene.
(b) Copolymers: Polymers formed by addition polymerisation of two different monomers.
Examples: Buna-S, Buna-N.
(ii) Condensation Polymers: Polymers formed by repeated condensation reaction between two different bifunctional or tri-functional monomeric units with elimination of simple molecules.
Examples: Nylon 6, 6, Nylon 6.
4.Molecular Forces:
(i) Elastomers: Polymer chain are held together by weakest intermolecular forces. Polymers are rubber-like solids with elastic properties.
Examples: Buna-S, Buna-N, Neoprene.
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Chemistry Class 12 Exam Resources: Unit 15 Polymers
Core Study Kit: Class 12 Chemistry Unit 15 Polymers
Explore essential learning tools for Class 12 Chemistry Unit 15 Polymers. This curated collection features in-depth notes and targeted practice questions built around the active 2026 curriculum to streamline your daily revision.
NCERT-Aligned Solutions for Unit 15 Polymers
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Our advanced study package for Unit 15 Polymers includes detailed concepts, diagrams, Mind Maps, and explanation of complex topics to ensure Class 12 students learn as per syllabus for 2026 exams.
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