Investigation of some factors which effect on rate of evaporation of antioxidants and ultraviolet stabilizers

Abstract

Volatility is a physical property which effect the retention of antioxidants during processing and use of polymeric products. The volatility data abtained for such compounds are very useful in choosing an antioxidant for particular application. In this study measurement of volatilities of some phenolic antioxidants and UV stabilizers were done by using an apparartus specially designed for this purpose. It is apparent that the molecular weight and the molecular structure have a significant effect on the evaportion rate of the antioxidants as well as UV stabilizers. The polarity of the compounds also reduces the volatility while the environmental conditions such as vacuum enhances the volatility by a factor of 10.