NEET 2022 Physics and Chemistry

- Thermoplastic polymers are the linear or slightly long chain molecules capable of repeatedly softening and hardening on cooling.
- Thermosetting polymers are cross-linked or heavily branched molecules, which on heating undergo extensive cross-linking in moulds and again become infusible. These cannot be reused.
- Elastomers have polymer chains held together by weak intermolecular forces.
- Fibres possess high tensile strength.