Polymer, Polymerization and Polymer Classification | Chemistry Notes Info - Your Chemistry Tutor provide notes for Classes, BSc, MSc, Chemistry Test

Polymer, Polymerization and Polymer Classification

Polymer And Polymerization

Condensation Polymer: Nylon-6-6, Terylene.
Addition Polymer: Polythene, Neoprene.

Polymer Classification

Polymer Classification on the basis of Source:

1.    Natural Polymer

                                  These are polymers which found in nature (in plants and animals). Example- Protein, Cellulose, Rubber.

2.    Semi-synthetic Polymer

                                         These are polymers which are prepared by treating naturally occurring polymers. Example- Cellulose Derivatives as cellulose acetate (Rayon), Cellulose Nitrate.

3.    Synthetic Polymer

                              These are polymers which are prepared by human beings in industry. Example- Plastic (Polyethene), Synthetic Fibers ( Nylon 6-6), Buna-S.

Polymer Classification on the basis of Structure:

1.    Linear Polymer

                                These are polymers which contain long and straight chains. Example- High Density Polythene, Polyvinyl Chloride.

2.    Branched Chain Polymer

                                                  These are polymers which contain linear chains with some branches. Example- Low Density Polythene.

3.     Cross Linked or Network Polymer

                                                                These are polymers which contain bi & tri functional monomers and contain very strong covalent bonds between the various linear polymer chains. Example- Bakelite, Melamine.

Polymer Classification on the basis of Molecular Forces:

1.    Elastomers

                     These are polymers which have elastic property means they can be stretched. Example- Weak intermolecular forces. eg.- Natural Rubber, Synthetic Rubber.

2.    Fibers

            These are polymers which have thread forming property and possess high tensile strength, high modulus and strong intermolecular forces. Example- Polyamides (Nylon6-6), Polyesters (Terylene).

3.    Thermoplastic

                              These are polymers which have linear or slightly branched long chain molecules which are capable of repeatedly softening on applying heating and hardening on applying cooling. Example- Polythene, Polystyrene.

4.    Thermosetting

                              These polymers contain cross linked and heavily branched molecules. These polymers on heating undergo extensive cross linking in moulds. Thermosetting polymers can't be reused. Example- Bakelite, Urea Formaldehyde Resins.
Chemistry Terminology by:- www.ChemistryNotesInfo.com
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