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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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A material which becomes soft and pliable when heated (without change in its other properties) and hard and rigid when cooled again.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
thermoplasticA polymer material that becomes pliable with heat, and with sufficient temperature, a liquid. When cooled, thermoplastics return to solid. There are more than 40 types, including acrylic, polypropylene, polycarbonate and polyethylene. Dating back to the mid-1800s, celluloid was the first thermoplastic, which remained popular until the mid-1900s. See thermoset and 3D printing.
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