纳米TiO_2对聚丙烯/尼龙6共混物的增容作用  

Compatibilization of Nanometer-Sized TiO_2 on Polypropylene/Polyamide 6 Blends

作　　者：欧宝立[1,2] 李笃信[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]湖南科技大学化学化工学院,湖南湘潭411201

出　　处：《高分子材料科学与工程》2009年第12期52-54,58,共4页Polymer Materials Science & Engineering

基　　金：湖南省自然科学基金资助项目(06JJ20036);中南大学创新基金项目;粉末冶金国家重点实验室基金资助

摘　　要：用SiO2和环氧基硅烷偶联剂对纳米TiO2进行修饰合成功能化纳米TiO2(sTiO2-O),然后与聚丙烯/尼龙6共混物进行熔融共混制备了sTiO2-O/PP/PA6纳米复合材料。通过拉伸、冲击等力学性能测试并结合扫描电镜对分散相尼龙6尺寸大小观察表明,由于功能化纳米粒子表面环氧基与PA6中氨基能发生化学反应,有效提高了两相的界面作用;少量纳米TiO2的加入使分散相尼龙6尺寸大幅度减小,并使复合材料拉伸和冲击强度大幅度提高,由此表明功能化纳米TiO2对不相容PP/PA6共混物具有良好的增容作用。The nanometer-sized TiO2 were firstly coated with a silica nanofilm and pretreated by silane coupling agent containing epoxy,and then blended with polypropylene（PP）/polyamide 6（PA6） blends.The compatibilizations of the functionalized-TiO2 on the PP/PA6 blends were investigated by means of scanning electron microscopy（SEM）.SEM observation shows the domain size of the dispersed PA6 phase significantly decreases with the addition of nanometer-sized TiO2.Due to the epoxy-functionalized TiO2 can react with amino group of PA6,a stronger interfacial adhesion between nanometer-sized TiO2,PP and PA6 is obtained,which was confirmed by mechanical analysis.The improved mechanical properties and decreased dispersed PA6 domain indicate the nanometer-sized TiO2 plays the role of coupling species between the two polymers.Therefore,a clear compatabilization effect is induced by nanometer-TiO2 in the immiscible PP/PA6 blends.

关 键 词：纳米二氧化钛 增容 聚丙烯/尼龙6共混物 

分 类 号：TB383[一般工业技术—材料科学与工程]