增容剂对聚丙烯/粘土纳米复合材料热分解动力学的影响  

INFLUENCE OF COMPATIBILIZER ON THE KINETICS OF THERMAL DECOMPOSITION OF POLYPROPYLENE/CLAY NANOCOMPOSITES

作　　者：丁超[1] 何慧[1] 薛峰[1] 郭宝春[1] 贾德民[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640

出　　处：《高分子学报》2006年第3期377-381,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号20304003);广东省自然科学基金重点项目(基金号020966);广东省自然科学基金团队项目(项目号39172)资助项目

摘　　要：采用三单体固相接枝聚丙烯作为增容剂制备了聚丙烯粘土纳米复合材料.通过XRD和TEM表征了其纳米结构.利用动态TGA方法研究了聚丙烯和纳米复合材料的热稳定性.分别采用Flynn Wall Ozawa和Kissinger法研究了聚丙烯及其纳米复合材料的热分解动力学.结果都表明,蒙脱土的加入明显提高了聚丙烯的起始热分解温度,纳米复合材料热失重10%时的温度比聚丙烯提高40K左右;纳米复合材料的热分解温度区间明显比聚丙烯的窄;纳米复合材料热分解表观活化能明显增大,与聚丙烯相比提高50%以上.Polypropylene/elay nanocomposites were prepared with three monomers solid-phase grafted PP as compatibilizer. The nanostructures were characterized by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. Dynamic thermogravimetric analysis （TGA） of PP and the nanocomposites was performed. Flynn-Wall-Ozawa and Kissinger equations were used to compute the weight loss data and calculate the activation energies of decomposition. The temperature of weight loss of 10 % for the nanocomposites is 40 K higher than that for the neat PP. The decomposition region for the nanocomposites was also found to be much narrow than that for the neat PP. The apparent activation energy of thermal decomposition of the nanocomposites was 50 % higher than that of the neat PP.

关 键 词：聚丙烯 粘土 纳米复合材料 热分解 动力学 

分 类 号：TB383.1[一般工业技术—材料科学与工程]