A Simple Technique May Make Plastics Melt Proof

Polymers are long, repetitive chains of molecules, and most can be readily fabricated into such things as plastic milk bottles and beach balls. But these familiar plastics are sensitive to heat, sagging or melting at fairly low temperatures. While there are polymers that can withstand temperatures of 750 F or more, they often stubbornly resist processing. Getting them molten enough to flow into a mold takes so much heat that the polymer decomposes.

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