Ziegler-Natta催化剂的功能化及聚烯烃高性能化

Functionalization of Ziegler-Natta Catalysts and Development of High-Performance Polyolefin Materials

介绍了Ziegler-Natta催化剂功能化的几种策略,以及其应用于聚烯烃高性能化的研究进展。Ziegler-Natta催化剂/先进聚合助剂复合策略可有效扩展Ziegler-Natta催化剂性能,其中Ziegler-Natta/ω-烯烃甲基二氯硅烷功能催化剂体系在制备长链支化/高熔体强度聚丙烯方面已显示出工业潜力,而Ziegler-Natta/非共轭α,ω-双烯烃体系为丙烯多相共聚提供了革命性的技术,使丙烯多相共聚不但可生产高抗冲聚丙烯(低橡胶含量),也可生产聚丙烯基热塑性弹性体(高橡胶含量)。Ziegler-Natta/茂(非茂)复合催化剂和纳米负载Ziegler-Natta催化剂可进一步丰富Ziegler-Natta催化剂性能,制备新型高性能聚烯烃材料。

Progress on high-performance polyolefin materials development based on functionalization of Ziegler-Natta catalysts is introduced. Ziegler-Natta catalyst/Advanced Polymerization Coagent(APC) compound strategy greatly expands the property envelop of Ziegler-Natta catalysts. Among the ongoing developments, Ziegler-Natta/ω-alkenylmethyldichlorosilane functional catalyst system has shown its industrial potential in preparation of long-chain-branched/high-melt-strength polypropylene(PP), while Ziegler-Natta/nonconjugated α,ω-diolefin system provides a revolutionary innovation to heterophasic polymerization of propylene, allowing preparation of PP-based thermoplastic elastomers(TPO, with increasing rubber contents). Other strategies such as Ziegler-Natta/metallocene compound catalysts and nano-supported Ziegler-Natta catalysts further boost Ziegler-Natta catalysts properties for preparation of new high-performance polyolefin materials.