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首先通过原位聚合法合成了一种新型多壁碳纳米管/液晶高分子复合材料(MCNT/LCP),然后将其与聚丙烯共混,制备了一系列的共混样品。采用FT-IR、DSC与POM等表征了MCNT/LCP复合材料的结构与液晶性能,利用XRD与DSC研究了聚丙烯共混物的结晶结构与结晶动力学,探讨了MCNT/LCP含量与结晶温度对聚丙烯共混物结晶行为的影响。结果表明:所合成的MCNT/LCP呈现近晶相的扇形织构,当MCNT/LCP被引入到聚丙烯中后,不仅起到异相成核的作用,而且能诱导β晶的形成,同时,DSC降温曲线峰型也变得比较尖锐,结晶峰温度提高,结晶速度加快。
A novel multi-walled carbon nanotube / liquid crystal polymer composite (MCNT / LCP) was synthesized by in-situ polymerization and then blended with polypropylene to prepare a series of blended samples. The structure and liquid crystal properties of MCNT / LCP composites were characterized by FT-IR, DSC and POM. The crystal structure and crystallization kinetics of the blends were investigated by XRD and DSC. The effects of MCNT / LCP content and crystallization temperature On the crystallization behavior of polypropylene blends. The results showed that the MCNT / LCP exhibited a fan-shaped texture of smectic phase. When MCNT / LCP was introduced into polypropylene, it not only played the role of heterogeneous nucleation, but also induced the formation of β crystal. At the same time, DSC cooling curve also becomes more sharp peak shape, crystallization peak temperature increases, crystallization speed.