Research Progress on Ultraviolet Resistance Performance of PMIA Fiber

摘要

In this paper,the photodegradation mechanism of PMIA under ultraviolet light is described in detail.Due to the presence of amide groups,the molecular chains are easily to be broken by exposure to ultra-violet light,which leads to the significant drop of the PMIA's mechanical performance and meanwhile the fiber's color becomes dark.To improve the UV resistance performance of PMIA,two methods have been discussed.The first method is melt-mixing,by adding UV absorbers to PMIA,such as benzophenone,triazine,benzotriazole and hindered anime etc.These UV absorbers consume the ultraviolet light's energy and protect polymeric and other lightsensitive materials from degradation by sunlight or UV.The second method is adding monomers with ultraviolet resistance during the polymerization.This is a promising solution allowing better structure stability of PMIA.