Polymers Test - 5

Nylon2-nylon6 is an alternating polyamide copolymer of glycine (H₂N–CH₂–COOH) and amino caproic acid [H₂N (CH₂)₅ COOH] and is biodegradable. Biodegradable polymers contain functional groups similar to the functional groups present in biopolymers. 

Thermostetting polymers are the linear or slightly branched long chain molecules capable of repeatedly softening on heating and hardening on cooling. These polymers possess intermolecular forces of attraction intermediate between elastomers and fibres. Some common thermoplastics are polythene, polystyrene, polyvinyls, etc.

Thermosetting polymers are the linear or slightly branched long chain molecules capable of repeatedly softening on heating and hardening on cooling. These polymers possess intermolecular forces are intermediate between elastomers and fibres. Some common thermoplastics are polythene, polystyrene, polyvinyls, etc.

PHBV is an aliphatic polyester used in speciality packaging, orthopaedic devices and in controlled release of drugs. PHBV undergoes bacterial degradation in the environment. So it reduces accumulation of synthetic solid polymer waste.

Polymer formed from Glycine and amino caproic acid is nylon 2-nylon 6 and polymer formed from 3 – hydroxybutanoic acid and 3 – hydroxypentanoic acid is PHBV. Both of them are biodegradable.

Vulcanisation consists of heating a mixture of raw rubber with sulphur and an appropriate additive at a temperature range between 373 K to 415 K. On vulcanisation, sulphur forms cross links at the reactive sites of double bonds and thus the rubber gets stiffened.