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Related to thermoplastic: thermoplastic resin
1. (of a material, esp a synthetic plastic or resin) becoming soft when heated and rehardening on cooling without appreciable change of properties
2. a synthetic plastic or resin, such as polystyrene, with these properties
A polymeric material with a linear macromolecular structure that will repeatedly soften when heated and harden when cooled; for example, styrene, acrylics, polyethylenes, vinyls, nylons, and fluorocarbons. Also known as thermoplastic resin.
A material which becomes soft and pliable when heated (without change in its other properties) and hard and rigid when cooled again.