Properties and morphology of nanocomposites based on styrenic polymers, Part II: Effects of maleic anhydride units
Properties and morphology of nanocomposites based on styrenic polymers, Part II: Effects of maleic anhydride units
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基于苯乙烯聚合物的纳米复合材料的性能和形貌，第二部分：马来酸酐单元的影响
DOI：
10.1016/j.polymer.2006.10.013
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发表时间：
2006
期刊：
影响因子：
4.6
通讯作者：
D. R. Paul
中科院分区：
文献类型：
--
作者：
H. Stretz;D. R. Paul
基于马来酸酐（MA）对聚烯烃-马来酸酐接枝共聚物（SMA）纳米复合材料剥离性能的增强作用，研究了MA在SMA纳米复合材料中的作用。SMA纳米复合材料使用DSM熔融混炼机混合，然后在气动台式成型机中注塑成型。这些材料产生与来自先前研究的SAN基纳米复合材料相同的模量增强和TEM基面颗粒密度（基于重量百分比），但是TEM基面颗粒密度总体上保持低于聚烯烃-g-MA混合物的文献值。这种行为是由苯乙烯和表面活性剂的烷基尾部之间的排斥相互作用解释的，这表明极性表面活性剂尾部可以导致苯乙烯共聚物基/蒙脱土纳米复合材料的剥离得到改善。讨论了共聚物中加入MA后熔体粘度和剪切力的增加对粒子分散的影响。
Based on enhancement in exfoliation for polyolefin-g-maleic anhydride composites with the addition of as little as 1wt% maleic anhydride (MA), the effect of MA in styrene–maleic anhydride copolymer (SMA)-based nanocomposites was studied. SMA nanocomposites were mixed using a DSM melt compounder followed by injection molding in a pneumatic bench top molder. These materials produced the same modulus enhancement and TEM-based areal particle densities on a weight percent basis as SAN-based nanocomposites from a previous study, but the areal TEM-based particle densities remained lower overall than literature values for polyolefin-g-MA mixtures. This behavior is explained by repulsive interactions between styrene and the alkyl tail of the surfactant, suggesting that polar surfactant tails could lead to improved exfoliation in styrene copolymer-based/montmorillonite nanocomposites. The role of increased melt viscosity and shearing on particle dispersion as MA is added to the copolymer is discussed.