【摘要】 分别以甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)为单体,通过原位聚合对纳米Sb2O3进行改性,研究了Sb2O3 MMA体系的原位聚合反应和处理后Sb2O3的粒径分布。改性后的Sb2O3与聚丙烯(PP)熔融复合制备PP Sb2O3复合材料,利用扫描电子显微镜(SEM)表征复合材料的微观结构。结果表明Sb2O3对MMA的聚合反应无阻聚作用,表面包覆的聚甲基丙烯酸甲酯(PMMA)能有效地解决纳米Sb2O3粒子自身团聚的问题,同时也增强了PP基体与Sb2O3之间的相互作用,使Sb2O3以纳米尺寸分散在PP基体中,但随着纳米Sb2O3填充量的增加,纳米Sb2O3亦存在团聚的倾向。而纳米Sb2O3表面包覆PBA后,纳米Sb2O3以更小的尺寸分散在PP基体中,纳米Sb2O3填充量增加后,纳米Sb2O3亦能以纳米尺寸分散在PP基体中。更多还原

【Abstract】 Polypropylene (PP)/antimony trioxide (Sb2O3) nanocomposites were prepared by mechanical melting blending. The nanosized Sb2O3 powders were modified by insitu polymerization of methyl methacrylate (MMA) and butyl acrylate (BA), respectively. The insitu polymerization kinetic of MMA/ Sb2O3, particle size distribution of modified Sb2O3 particles and morphological structures of PP/Sb2O3 composites were investigated. The results showed that Sb2O3 does not inhibit the polymerization of MMA, and PMMAs covering on the surface of Sb2O3 effectively depress the aggregation of nanoscale particles, and enhance the nanosized dispersion of Sb2O3 in the PP matrix. However, with increasing the filling load of Sb2O3, nanosized Sb2O3 particles still tends to aggregate. When Sb2O3 particles were modified by insitu polymerization of BA, the dispersion of nanosized Sb2O3 particles is further improved. At high loading, Sb2O3 particles can still disperse as the nano size in PP matrix.更多还原