Abstract
This chapter discusses the results of weathering exposure of general purpose polystyrene. It is available in various grades such as easy flow, intermediate flow, and high heat resins. Polystyrene undergoes light-induced yellowing upon exposure to UV light. Although the origin of the yellowing is not clear, the presence of air slows down the yellowing process. Yellowing is attributed to conjugated polyenes, various oxygenated species, or products of ring-opening reactions. BASF Polystyrol® is stabilized against aging caused by exposure to atmospheric oxygen at elevated temperatures. Under normal light and temperature conditions indoors, parts made of Polystyrol® retain their appearance and functionality for years. Under the normal conditions of light and temperature encountered indoors, Polystyrol® moldings retain their appearance and perform their functions efficiently for many years. It is found that the materials subjected to oxygen are degraded much faster in the presence of radiation than in its absence and vice versa. The discoloration of polystyrene occurs more rapidly when irradiation takes place in air or oxygen.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
