耐老化聚丙烯的研究进展

Research Progress of Aging Resistant Polypropylene

聚丙烯(PP)是用途非常广泛的通用塑料,但分子链结构存在大量的叔碳原子,受到氧气、紫外线和热的影响,聚丙烯会发生热氧老化降解和光老化降解,限制了它在某些领域的应用。本文分析了聚丙烯老化的原因和机理,结合聚丙烯改性常用的方法,从改变晶体结构、添加抗氧剂、光稳定剂等方面阐述提高聚丙烯老化性能的方法。

Polypropylene(PP) is a general-purpose plastic with a wide range of applications. However, there are a large number of tertiary carbon atoms in the molecular chain structure. Due to the influence of oxygen, ultraviolet and heat, polypropylene will undergo thermal oxidative degradation and photo aging degradation, which limits its application in some fields. In this paper, the reasons and mechanism of aging of polypropylene are analyzed. Combined with the common methods of Polypropylene Modification, the methods to improve the aging performance of polypropylene are described from the aspects of changing crystal structure, adding antioxidant and light stabilizer.