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Thermoplastic polymers can be categorized into two types: amorphous and semi-crystalline.

Oct 29, 2019

Amorphous polymers melt gradually when heated. During cooling, amorphous polymer chains solidify slowly in a random orientation. Common amorphous polymers include ABS, polystyrene, polycarbonate, and PVC.

 

Semi-crystalline polymers melt quickly, once heated to their melting temperature. Semi-crystalline polymers include nylon, polyester, polyethylene, and polypropylene.

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