What are the Working Temperatures of Plastics?
The correct definition for the “working” temperature of a plastic is how hot it can become and still function normally. Most plastics can go -40 F and retain their physical properties without becoming overly brittle (except flexible vinyl convertible windows). There are special cryogenic grades of plastic(G10,UHMWPE) that will go below -400 F ! For the most part, most plastics will soften or lose their structural properties around 200 F.
