defferentiale between tharmoplastic and tharmosetting plastic, listing one example each tu
Answers
Answer:
Thermoplastic plastics Thermosetting plastics
1) Such polymers or plastics are usually formed by addition polymerisation. 1) These plastics are usually formed by condensation polymerisation.
2) They are linear or slightly branched long chain polymers. 2) They are cross linked or heavily branched.
3) They can be easily soften on heating and hardened on cooling. 3) It cannot be softened on heating.
4) They are held together by Van der Waal forces of attraction. 4) They are held together by strong hydrogen bonds.
5) By nature they are soft, weak and less brittle. 5) They are strong, hard and more brittle in nature.
6) Their molecular weight is low. 6) Their molecular weight is large.
7) They are quite soluble in organic solvents. 7) They are insoluble in organic solvents.
8) They can be remoulded into desired shapes. 8) They cannot be remoulded.
9) Monomers used here do not have more than two reaction sites. 9) Monomers used here have more than two reaction sites.
10) Examples: polythene, polystyrene, polyvinyls, etc. 10) Examples: bakelite, urea-formaldehyde resins, etc.
Explanation:
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