采用微乳液作为成核剂载体将苯甲酸钠加入聚丙烯,研究其对聚丙烯力学性能及结晶行为的影响.将成核剂苯甲酸钠溶解于水中作为水相,与油相Marcol-52、表面活性剂吐温60和助表面活性剂正己醇共混,制备了一种含有苯甲酸钠成核剂的微乳液.将苯甲酸钠微乳液和成核剂粉末分别加入聚丙烯中熔融共混后测试.力学性能、小角X射线散射、偏光显微镜及差示扫描量热仪等结果表明,与苯甲酸钠粉末比较,采用微乳液法将成核剂分散到聚丙烯中,能够使聚丙烯获得更高的取向度、弯曲弹性模量和弯曲强度,而且成核剂能在聚丙烯结晶过程中产生更多的晶核,提高了聚丙烯的结晶度.
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