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InterviewSolution
| 1. |
Arrange the polymers in order of their increasing intermolecular forces: (1). Nylon 6, 6, Buna-S, polyethylene, (2). Nylon 6, neoprene, polyvinyl chloride |
| Answer» Buna-S and neoprene are elastomers. On the other hand, polyethylene, polyvinyl chloride, nylon 6 and nylon 6, 6 are thermoplastic polymers. Intermolecular forces of attraction in elastomer are weaker than those in thermoplastic polymers. Nylon 6 and nylon 6, 6 are polar in nature. Molecular chains in these two polymers are held by hydrogen bondings. Because of this, intermolecular forces of attraction in nylon 6 or nylon 6, 6 are stronger than those in polyethylene or polyvinyl chloride. Therefore, in case of (1), the order will be: Buna-S lt polyethylene lt nylon 6, 6 and in case of (2), it will be neoprene lt polyvinyl chloride lt nylon 6. | |