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采用熔融共混法制备PP/纳米SiO2/POE复合材料,并通过力学性能测试、DSC分析以及材料断面形貌分析等手段,对增强增韧效果进行研究。结果表明纳米SiO2和POE微粒显现了比较明显的协同增韧效果,当PP/纳米SiO2/POE为100/4/15时,综合力学性能最优。纳米SiO2的成核作用提高了PP的结晶温度和结晶速率。两种微粒在PP基体中达到均匀分散,其中纳米SiO2粒子平均粒径为150nm,与其二次粒子直径相当,表明熔融过程并未造成纳米粒子的团聚。
The melt blending method was used to prepare PP / nano-SiO2 / POE composites. The toughening effect was studied by means of mechanical properties test, DSC analysis and cross-sectional morphology analysis. The results show that nano-SiO2 and POE particles exhibit obvious synergistic toughening effect. When PP / nano-SiO2 / POE is 100/4/15, the composite mechanical properties are the best. The nucleation of nano-SiO2 increases the crystallization temperature and crystallization rate of PP. Two kinds of particles in the PP matrix to achieve uniform dispersion, in which the average particle size of nano-SiO2 particles 150nm, and its secondary particle diameter equivalent, indicating that the melting process did not cause nanoparticles agglomeration.