Distinguish between thermoplastic polymers and thermosetting polymers.

The distinguishing between thermoplastic and thermosetting polymers is as follows: Thermoplastic polymers Thermosetting polymers 1 . These are formed by addition polymerization. 1 . These are formed by condensation polymerization. 2 . They can be easily softened repeatedly on heating and hardened on cooling. 2 . They can not be softened and reshaped again on heating. 3 . They have low molecular weight. 3 . They have high molecular weight.

Elastomers are synthetic rubber. In these elastomeric polymers, the polymer chains are held together by the weakest intermolecular forces. These weak binding forces permit the polymer to be stretched.

Write a chemical reaction to prepare the following polymer: Dextron

Dextron is a copolymer that is prepared by the copolymerization of lactic acid and glycolic acid by the following chemical reaction,

Write a chemical reaction to prepare the following polymer: Nylon- 6

Nylon- 6 is prepared by heating ε -caprolactam with water at high temperature by the following chemical reaction, In the above reaction, ring-opening polymerization of caprolactam took place to form the polyamide that is nylon- 6 .

Write a chemical reaction to prepare the following polymer: Teflon

Teflon is prepared by tetrafluoroethene that is gas at room temperature. Tetrafluoroethene is polymerized with a free radical or persulphate catalyst at high pressure by the following chemical reaction,