Question:
Which among the following is NOT a polyester polymer ?
Which among the following is NOT a polyester polymer ?
Show Hint
Novolac is a phenol-formaldehyde polymer, not a polyester.
Updated On: Oct 1, 2026
- Glyptal
- Novolac
- PHBV
- Dacron
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
A polyester has repeating ester (-COO-) links, formed from a diol with a diacid or a hydroxy acid.
Step 2: Detailed Explanation
Glyptal is made from ethylene glycol and phthalic acid, so it is a polyester. PHBV is a copolymer of 3-hydroxybutanoic and 3-hydroxypentanoic acids joined by ester links. Dacron (terylene) is made from ethylene glycol and terephthalic acid.
Novolac is a linear phenol-formaldehyde polymer with no ester groups, so it is not a polyester.
Final Answer:
Novolac is not a polyester, option (B). \[ \boxed{\text{Novolac}} \]
A polyester has repeating ester (-COO-) links, formed from a diol with a diacid or a hydroxy acid.
Step 2: Detailed Explanation
Glyptal is made from ethylene glycol and phthalic acid, so it is a polyester. PHBV is a copolymer of 3-hydroxybutanoic and 3-hydroxypentanoic acids joined by ester links. Dacron (terylene) is made from ethylene glycol and terephthalic acid.
Novolac is a linear phenol-formaldehyde polymer with no ester groups, so it is not a polyester.
Final Answer:
Novolac is not a polyester, option (B). \[ \boxed{\text{Novolac}} \]
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