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Q.

Which among the following is not a polyester? 
 

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a

Glyptal 
 

b

PHBV 
 

c

Dacron 
 

d

Novolac 
 

answer is D.

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Detailed Solution

Novolac is a linear polymer of phenol and formaldehyde and has no ester linkage. Therefore, it is not a polyester.

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