Saved Bookmarks
| 1. |
How are polymers classified on the basis of forces operating between their molecules? To which of these classes does nylon-6,6 belong? |
|
Answer» Solution :(i) Elastomers: The polymer chains are held together by weak intermolecular forces. Example - BUNA - S, Buna - N, Neoprene. (ii) Fibres: They have STRONG forces of attraction. Example - Polymides, (Nylon 6,6), polyesters. (iii) Thermoplastics: They are long chain molecules capable of repeatedly softening on heating and hardening on cooling. Example - Polythene, POLYSTYRENE. (iv) Thermosetting PLASTICS: They do not BECOME soft on heating and cannot be remoulded. Example - Bakelite, Nylon - 6,6, belong to fibres. |
|