Incorrect statement regarding cross-linked or network polymers is:
1. | They contain covalent bonds between various linear polymer chains. |
2. | They are formed from bi and tri functional monomers. |
3. | Examples are bakelite and melamine. |
4. | They contain strong covalent bonds in same polymer chain. |
The correct structure of Nylon-6,6 polymer is:
1. | |
2. | |
3. | |
4. |
Natural rubber has:
1. All trans-configuration
2. Alternate cis - and trans-configuration
3. Random cis - and trans-configuration
4. All cis-configuration