微波辐照下PP纳/米TiO_2复合材料的非等温结晶行为  

Nonisothermal Crystallization Behavior of PP/Nano-TiO_2 Composite through Microwave Irradiation

作　　者：龙绍檑[1] 伍玉娇[1,2] 何辉[1,2] 杨少渊[1] 杨富先[1] 蔡启军[1] 

机构地区：[1]贵州大学材料与冶金学院,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》2011年第1期21-24,共4页Plastics

基　　金：国家大学生创新性实验计划项目[贵大国创字(2009)019];贵州省基金项目[黔科合J字(2010)2004]

摘　　要：首先采用傅里叶红外光谱仪(FT-IR)表征了微波辐照前后PP纳/米TiO2母粒的表面特征,然后经二次熔融挤出制备微波辐照PP/纳米TiO2复合材料。通过差式扫描量热仪(DSC)对微波辐照前后PP/纳米TiO2复合材料的非等温结晶行为进行研究。结果表明:微波辐照后,PP/纳米TiO2复合材料的结晶起始温度和结晶温度降低,结晶度提高了大约20%,结晶速率基本不变;微波辐照前后复合材料的非等温结晶动力学参数F(T)值相近。The surface-features of PP/nano-TiO2 masterbatch before and after microwave irradiation were investigated by FT-IR,and then PP/nano-TiO2 composite were prepared through secondary melt extrusion. The nonisothermal crystallization behavior of PP/nano-TiO2 composite before and after microwave irradiation were studied by differential scanning calorimetry （ DSC）. The results showed that the crystallization onset temperature and crystallization temperature of the composite decreased after microwave irradiation, and crystallinity increased by 20 %, while crystallization rate was remained. The values of nonisothermal crystallization kinetic parameter F（T） were similar before and after microwave irradiation.

关 键 词：聚丙烯 纳米TIO2 微波辐照 非等温结晶行为 结晶速率 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]