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Answer: 1. Teflon

Key idea: addition polymers form from unsaturated monomers by chain addition; condensation polymers lose small molecules.

Teflon is made from tetrafluoroethene (\(\mathrm{CF_2=CF_2}\)) by addition polymerisation. Nylon-66 (hexamethylenediamine + adipic acid), Novolac (phenol + formaldehyde) and Dacron (ethylene glycol + terephthalic acid) are condensation polymers.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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