What is the effect of crosslinks on an elastomer and what is the structural explanation for their effect? What would happen to the amount of stretch, hardness, strength, and creep in an elastomer if the crosslink density were increased?
What will be an ideal response?
Crosslinks prevent the elastomer from creeping at high temperature. Also, crosslinks give some limitations to the range of elasticity for the polymer. These effects arise from the limiting effects of the crosslinks. The crosslinks bind the molecules together and do not permit unlimited stretching. Also, during creep, the crosslinks act as limiting forces to the continuation of creeping motion. If the crosslink density were increased, the amount of stretching would be lower, the strength higher, the hardness and the amount of creep would be lower.
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