为研究正辛基笼形倍半硅氧烷（O-POSS）对等规聚丙烯（iPP）的改性作用，合成了O-POSS并将其与iPP共混制备了iPP／O-POSS纳米复合材料，研究了O-POSS含量对复合材料的流变性、力学性能和结晶行为的影响。结果表明，O-POSS的加入可改善iPP的流动性，熔体假塑性增强；加入O-POSS后复合材料的球晶尺寸变小，熔点和结晶度提高，且有助于改善材料的力学性能，O-POSS含量为4％～6％（质量分数，下同）时，复合材料有较好的力学性能。%N-octyl polyhedral oligomeric silsesquioxane （O-POSS） was synthesized and introduced into iPP forming nanocomposites. The rheological, mechanical, and crystallization behaviors and properties of the composites were investigated. It showed that O-POSS improved the rheological behavior, increased the crystallinity and melting temperature of iPP. When the amount of O-POSS was between 4 % and 6 % , the composites gave rise to excellent mechanical properties.
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