Effect of talc/MMA in situ polymerization on mechanical properties of PVC-matrix composites
Effect of talc/MMA in situ polymerization on mechanical properties of PVC-matrix composites
复制标题
DOI：
10.1002/app.1310
复制
发表时间：
2001-06
影响因子：
3
通讯作者：
Xiaolin Xie;Bo-geng Li;Z. Pan;R. Li;S. Tjong
中科院分区：
文献类型：
--
作者：
Xiaolin Xie;Bo-geng Li;Z. Pan;R. Li;S. Tjong
在这项研究中，聚甲基丙烯酸甲酯（PMMA）包覆滑石粉的甲基丙烯酸甲酯在滑石粉表面的原位聚合。聚合反应通过间歇和连续乳液方法进行。系统地研究了聚合动力学、粒径及分布、接枝效率和包覆滑石形态。结果表明，滑石粉对PMMA的聚合没有影响。发现所产生的PMMA很好地覆盖滑石表面。然而，只有少量可以接枝到滑石上。连续乳液聚合法制备的滑石粉粒径分布比间歇法更均匀。处理后的滑石粉随后被用作聚氯乙烯（PVC）基体中的填料，PMMA涂层滑石粉/PVC复合材料的力学性能进行了研究。复合材料的形态结构表明，PMMA包覆滑石粉改善了滑石粉在PVC基体中的分散性，提高了滑石粉与PVC的界面结合力。复合材料的力学性能，特别是冲击强度，被发现得到改善。PMMA在滑石粉表面的包覆厚度对增韧效果有一定的影响。John Wiley & Sons，Inc.应用聚合物科学杂志80：2105-2112，2001
In this study, polymethyl methacrylate (PMMA)-coated talc was produced by the insitu polymerization of methyl methacrylate on the talc surface. The polymerization reaction was performed by both batch and semicontinuous emulsion processes. The polymerization kinetics, particle size and distribution, grafting efficiency, and coated-talc morphology were systematically investigated. It was found that the talc particles have no effect on the polymerization of PMMA. The PMMA produced was found to cover the talc surface well. However, only a small amount can be grafted onto the talc. The size distribution of talc particles treated by semicontinuous emulsion polymerization is more uniform than by batch polymerization. The treated talc was subsequently used as filler in a poly(vinyl chloride) (PVC) matrix, and mechanical properties of the PMMA-coated-talc/PVC composites were studied. Morphological structure of PVC-matrix composites revealed that the PMMA coating on talc improved the dispersion of talc in the PVC matrix and enhanced the interfacial adhesion between the talc and PVC. The mechanical properties of the composites, especially the impact strength, were found to be improved. There appears to be a critical covering thickness of PMMA on the talc surface for optimum toughening. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2105–2112, 2001