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张俊平, 杨继搞, 薛美玲*
(青岛科技大学 橡塑材料与工程教育部重点实验室，山东 青岛 266042)
摘要: 采用熔融共混法制备了聚丁烯-1/高岭土（PB-1/kaolin）纳米复合材料，运用SEM、DSC等分析了高岭土在PB-1中的分散以及高岭土用量对PB-1结晶行为和结晶动力学的影响。研究结果表明，当高岭土质量分数为2%时，高岭土在PB-1中呈纳米级分散；质量分数为6%时，出现轻微团聚现象。拉伸强度在高岭土质量分数为5%时达到最大值，而断裂伸长率、弯曲强度和弯曲模量在高岭土质量分数为4%左右时最佳。DSC结果表明，当高岭土质量分数超过2%时，显著地抑制了PB-1的结晶过程，但球晶的成核机制和三维生长方式不变。
关键词: 聚丁烯-1； 高岭土； 纳米复合材料； 结晶动力学
中图分类号: TQ 311 文献标志码： A
Mechanical Properties and Non-isothermal Crystallization Kinetics
of PB-1/kaolin Nanocomposites ZHANG Jun-ping, YANG Ji-gao, XUE Mei-lin
(Key Laboratory of Rubber-plastics, Ministry of Education, Qingdao University of
Science and Technology, Qingdao 266042, China)
Abstract: The poly(1-butene) (PB-1)/kaolin nanocomposites were prepared by melt-mixing. The dispersity of nano-kaolin was observed by SEM, and the effect of nano-kaolin content on the non-isothermal crystallization behavior and its kinetics of filled PB-1 were investigated by DSC method. The results indicate that nano-kaolin has better dispersity in PB-1/kaolin nanocomposites when the mass concentration of nano-kaolin was 2%, and nano-kaolin dispersion in the matrix of PB-1 reached a nanometer yardstick. There was slight agglomeration phenomenon when the mass concentration of nano-kaolin was 6%. The tensile strength achieved the maximum value when the concentration of nano-kaolin was 5%, and the elongation at break, the flexural strength and the flexural modulus were best when the mass concentration of nano-kaolin was 4%. DSC shows that the crystallization process of PB-1/kaolin nanocomposites were significantly inhibited when the mass concentration of nano-kaolin was more than 2%, but the nucleation and three-dimensional growth mechanism of spherulites keep invariant.
Key words: poly(1-butene); kaolin； nanocomposites; crystallization kinetics
收稿日期:2010-11-01
作者简介: 张俊平（1986—），男，硕士研究生. *通信联系人.
