Question:
Which from following polymers is obtained by condensation polymerization method?
Which from following polymers is obtained by condensation polymerization method?
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Dacron forms from terephthalic acid and ethylene glycol with loss of water or methanol.
Updated On: Oct 1, 2026
- Polythene
- Polyacrylonitrile
- Teflon
- Dacron
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
In condensation polymerisation, monomers with two functional groups join with elimination of small molecules such as water or methanol. In addition polymerisation, unsaturated monomers add to each other with no by-product.
Step 2: Detailed Explanation:
Dacron (terylene, polyethylene terephthalate) is made from ethylene glycol and terephthalic acid, or its dimethyl ester, with removal of water or methanol:
\[ n\,\text{HOCH}_2\text{CH}_2\text{OH} + n\,\text{HOOC-C}_6\text{H}_4\text{-COOH} \rightarrow [\text{-OCH}_2\text{CH}_2\text{O-CO-C}_6\text{H}_4\text{-CO-}]_n + 2n\,\text{H}_2\text{O} \]
Step 3: Why the other options are wrong.
Polythene (A) comes from ethene, polyacrylonitrile (B) from acrylonitrile and Teflon (C) from tetrafluoroethene. All three are made by addition polymerisation of a C=C monomer.
Final Answer:
Dacron is a condensation polymer, option (D). \[ \boxed{\text{Dacron (D)}} \]
In condensation polymerisation, monomers with two functional groups join with elimination of small molecules such as water or methanol. In addition polymerisation, unsaturated monomers add to each other with no by-product.
Step 2: Detailed Explanation:
Dacron (terylene, polyethylene terephthalate) is made from ethylene glycol and terephthalic acid, or its dimethyl ester, with removal of water or methanol:
\[ n\,\text{HOCH}_2\text{CH}_2\text{OH} + n\,\text{HOOC-C}_6\text{H}_4\text{-COOH} \rightarrow [\text{-OCH}_2\text{CH}_2\text{O-CO-C}_6\text{H}_4\text{-CO-}]_n + 2n\,\text{H}_2\text{O} \]
Step 3: Why the other options are wrong.
Polythene (A) comes from ethene, polyacrylonitrile (B) from acrylonitrile and Teflon (C) from tetrafluoroethene. All three are made by addition polymerisation of a C=C monomer.
Final Answer:
Dacron is a condensation polymer, option (D). \[ \boxed{\text{Dacron (D)}} \]
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