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Which of the following characteristics o...

Which of the following characteristics of thermosetting polymers?

A

Heavily branched cross linked polymer s

B

Linear slightly branched long chain molecules

C

Become infusible on moulding so cannot be reused

D

Soften on heating and harden on cooling can be reused

Text Solution

Verified by Experts

The correct Answer is:
A, C
Thermosetting polymer
(i) These are cross linked or heavily branched molecule.
(ii) These on heating undergo extensive cross linking in moulds and become infusible
(iii) These canot be reused
(iv) Examples are bakelite, urea form aldehydersin
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Which of the following are characteristics of thermosetting polymers ? I. Heavily branched cross linked polymers. II. Linear, slightly branched long chain molecules. III. Become infusible on moulding so cannot be reused. IV. Have strongest molecular forces. Choose the correct option.