define thermoplastics ?
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A plastic which can be softened repeatedly by heating and can be moulded into different shapes again and again is called thermoplastic.
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Thermoplastics are defined as polymers that can be melted and recast almost indefinitely. ... Some of the most common types of thermoplastic are polypropylene, polyethylene, polyvinylchloride, polystyrene, polyethylenetheraphthalate and polycarbonate.
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