Question:
Identify the monomers used for preparation of glyptal?
Identify the monomers used for preparation of glyptal?
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Glyptal is a polyester from ethylene glycol and phthalic acid.
Updated On: Oct 1, 2026
- Styrene and phosgene
- Ethylene glycol and phthalic acid
- Butadiene and ethylene glycol
- Acrylamide and urea
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Glyptal (also called alkyd resin) is a condensation polymer of the polyester family.
Step 2: Detailed Explanation:
It is formed by the condensation of ethylene glycol and phthalic acid (or phthalic anhydride):
\[ n\,\text{HOCH}_2\text{CH}_2\text{OH} + n\,\text{C}_6\text{H}_4(\text{COOH})_2 \rightarrow \text{glyptal} + n\,\text{H}_2\text{O} \]
Glyptal is used in paints and lacquers.
Step 3: Why the other options are wrong.
Styrene and phosgene (A) are not monomers for any common polymer pair. Butadiene and ethylene glycol (C) do not form glyptal. Acrylamide and urea (D) are not used for glyptal; urea combines with formaldehyde to give urea-formaldehyde resin.
Final Answer:
The monomers are ethylene glycol and phthalic acid, option (B). \[ \boxed{\text{Ethylene glycol and phthalic acid (B)}} \]
Glyptal (also called alkyd resin) is a condensation polymer of the polyester family.
Step 2: Detailed Explanation:
It is formed by the condensation of ethylene glycol and phthalic acid (or phthalic anhydride):
\[ n\,\text{HOCH}_2\text{CH}_2\text{OH} + n\,\text{C}_6\text{H}_4(\text{COOH})_2 \rightarrow \text{glyptal} + n\,\text{H}_2\text{O} \]
Glyptal is used in paints and lacquers.
Step 3: Why the other options are wrong.
Styrene and phosgene (A) are not monomers for any common polymer pair. Butadiene and ethylene glycol (C) do not form glyptal. Acrylamide and urea (D) are not used for glyptal; urea combines with formaldehyde to give urea-formaldehyde resin.
Final Answer:
The monomers are ethylene glycol and phthalic acid, option (B). \[ \boxed{\text{Ethylene glycol and phthalic acid (B)}} \]
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