稀土β聚丙烯成核剂研究及应用进展

Advances in research and application of rare earth β-nucleating agents for polypropylene

综述了稀土单核及多核β晶型成核剂的制备方法、组成,全面评述了以La为代表的稀土成核剂在均聚PP、各种共聚PP及再生PP中的应用,介绍了稀土成核剂与α成核剂、稀土成核剂与稀土偶联剂复合应用的进展。对不同种类的PP,稀土成核剂具有很高的β晶型成核能力,成核PP具有热变形温度高、冲击强度大、耐热稳定性好等优点。指出应重点加强稀土成核剂结构、成核机理及与其它助剂复合规律的研究。

Rare earth（RE）β nucleating agent,firstly developed for industrial application by Chinese scientists,is one type of β nucleating agents for polypropylene（PP）.Preparation methods and compositions of nucleating agents with single- and multi-core RE β crystalline form are described.Application situation of RE β nucleating agents especially La-containing nucleating agents in different PP homopolymer and copolymer are summarized comprehensively.RE β nucleating agents can be used in combining with α- nucleating agents and RE coupling agents with good collaborative effect.In brief,RE β nucleating agent has strong nucleation ability in forming β-PP that has high heat distortion temperature,impact strength and thermal stability etc.Further research for RE β nucleating agent should be focused on their structure and nucleation mechanisms,as well as combination rules with other additives.