抄録
Raported are the effect of humidity on the photodegradation of PVC. Photodegradation rate of PVC films slowed down under high percentage of humidity in weathering atomosphere. It is shown that main chain scission was retarded by the existence of water, which would start next to oxidation. Further experiments using copper sulfate with various contents of crystal water suggested that crystal water also restrained photodegradation.
