Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Upilex is a heat resistant polyimide film formed from biphenyl tetracarboxylic dianhydride (BPDA) monomers. Its properties include dimensional stability, low water absorption and high chemical resistance. It was developed by UBE Industries. The James Webb Space Telescope (JWST), anticipated to be launched in 2014 for a 10-year mission, will make observations in the infrared portion of the spectrum to examine the origins and evolution of our universe. Because it must operate at cold temperatures in order to make these sensitive measurements, it will use a large, lightweight, deployable sunshield, made of several polymer film layers, to block heat and stray light. This paper describes laboratory radiation durability testing of candidate JWST (previously NGST) sunshield polymer film materials.

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