PP/纳米TiO_2复合材料的结晶行为研究  

Study on the Crystallization Behavior of PP/nano-TiO_2 Composites

作　　者：何辉[1,2] 蒙日亮[1,2] 伍玉娇[1,2] 

机构地区：[1]贵州大学材料科学与冶金工程学院,贵州贵阳550003 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《塑料科技》2009年第12期31-35,共5页Plastics Science and Technology

基　　金：贵州省工业攻关项目(黔科合GY字(2006)3013)资助

摘　　要：采用傅里叶红外光谱仪(FT-IR)表征了改性前后纳米TiO2粉体的表面特征。通过熔融共混法制备了PP/纳米TiO2复合材料。通过力学性能测试、DSC热分析和POM照片观测,对PP/纳米TiO2复合材料的力学性能和结晶行为进行了研究。结果表明:纳米TiO2对PP既增强又增韧;纳米TiO2在PP结晶过程中具有异相成核剂的作用,能够提高PP结晶度和加速PP结晶,可明显细化PP晶粒。The surface-features of nano-TiO2 treated and untreated by titanate coupling agent（NDZ-201） were investigated by FT-IR. PP/nano-TiO2 composites were prepared through melt blending method. The mechanical properties and crystallization behavior were studied by means of mechanical property testing, differential scanning calorimetry（DSC） and polar optical microscope（POM）. The results showed that PP was strengthened and toughened by adding nano-TiO2 ; the surface treated nano-TiO2 acted as a nucleating agent, and the crystallinity of PP was increased and the crystallization of PP was accelerated, and then the size of PP spherulites in the composites were obviously smaller than that of pure PP.

关 键 词：聚丙烯 纳米TIO2 结晶行为 

分 类 号：TB332[一般工业技术—材料科学与工程]