What is thermoplastics
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A thermoplastic is a material, usually a plastic polymer, which becomes more soft when heated and hard when cooled. Thermoplastic materials can be cooled and heated several times without any change in their chemical or mechanical properties. When thermoplastics are heated to their melting point, they melt to a liquid.
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A denoting substances (especially synthetic resins) that become plastic on heating, and harden on cooling ......
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