a) Elasticity
b) Shrinkiness
c) Elastic memory
d) Shrinkability
Answer: c
Explanation: The property of a thermoplastic film to return to its original size is called elastic memory. It is the potential energy stored in the extended molecules which is a characteristic of oriented, non-heated set thermoplastics. When such a film is reheated to its orientation temperature, it shrinks as the molecules tend to return to their original size and spatial arrangement.
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