Polymer And Polymerization
Condensation Polymer: Nylon-6-6, Terylene.
Addition Polymer: Polythene, Neoprene.
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:
These are polymers which have elastic property means they can be stretched. Example- Weak intermolecular forces. eg.- Natural Rubber, Synthetic Rubber.
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).
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.
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