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The polymer made of which of the following monomer can be stretches and still retain its physical form. (1) Buna-N (2) Bakelite(3) Terylene(4) Nylon-6,6 |
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Answer» Correct option is (1) Buna-N In elastomeric polymers, the polymer chains are held together by the weakest intermolecular forces. These weak binding forces permit the polymer to be stretched. A few 'crosslinks' are introduced in between the chains, which help the polymer to retract to its original position after the force is released as in vulcanised rubber. The examples are buna-S, buna-N, neoprene, etc. |
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