Classification of Polymers
1. Natural – Synthetic
Based on the origin of the material, whether natural or synthesized.
2. Organic – Inorganic
Organic polymers have carbon backbone. PE, PP, PS etc. Inorganic polymers do not contain carbon backbone. Glass, Silicone polymers
3. Thermoplastic – Thermosetting Thermoplastics soften on heating.
Do not soften or melt on heating. Cross-linked chains.
4. Plastics, elastomers, fibers, resins
Classified as per the use of polymeric material.
5. Addition polymers – Condensation polymers Based on manufacturing process.
The classification based on manufacturing process is important for the course, ‘Industrial Polymerization’.
Addition Polymerization: Also called as Chain Polymerization, Chain growth Polymerization, Chain Reaction Polymerization.
Condensation Polymerization: Also called as Step Polymerization, Step Growth Polymerization, Step Reaction Polymerization.
Examples:
Addition polymers: Polyethylene, Polypropylene, PVC, Polystyrene
Condensation polymers: Polyesters, Nylon 66, Polycarbonates, Polyurethanes, Epoxy resins.
