以吸附自组装和共缩聚法制备的PS/MCM-41-g-MPS和P(St-MPS)/MCM-41两种具有不同界面作用的"核-壳"结构复合微球为填料,对聚丙烯(Polypropylene, PP)进行改性,研究了复合微球种类及用量对PP力学与结晶性能的影响.结果表明:两种复合微球的添加均可以显著提高PP的力学性能,在复合微球PS/MCM-41-g-MPS和P(St-MPS)/MCM-41的添加量均为2%(质量分数,下同)时,两种PP复合材料的拉伸强度分别比纯PP提高了12%和13%;而添加量为4%时,两种复合材料的冲击强度分别提高了68%和63%,复合微球的添加也促进了β晶的形成;但由于两种复合微球核-壳界面作用的不同,对PP力学及结晶性能的改善作用具有一定的差异;SEM测试表明,核-壳粒子界面作用不同,直接影响其在基体中的分散及增韧增强效果.
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