纳米CaCO_3/PP复合材料光氧老化行为的红外光谱研究  

FT-IR Study on the Photo-Oxidative Degradation of Nano-CaCO_3/PP Composites

作　　者：王玉海[1] 沈浩[1] 麦堪成[1] 

机构地区：[1]中山大学化学与化学工程学院∥教育部聚合物基复合材料及功能材料重点实验室,广东广州510275

出　　处：《中山大学学报（自然科学版）》2008年第3期62-66,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(50573094);广州市科技局资助项目(2005Z3D2131)

摘　　要：熔融挤出制备了3种大分子相容剂改性纳米CaCO3/PP复合材料,利用FTIR研究了复合材料的光氧化行为。结果表明,纳米CaCO3促进了PP的光氧化降解,但不改变PP的光氧化反应机理。不同相容剂对纳米CaCO3/PP复合材料光氧化行为有不同的影响,马来酸酐接枝乙烯-辛烯共聚物(POE-g-MA)和马来酸酐接枝乙烯-醋酸乙烯酯共聚物(EVA-g-MA)促进纳米CaCO3/PP复合材料的光氧化降解,而马来酸酐接枝聚丙烯(PP-g-MA)降低纳米CaCO3/PP复合材料的光氧化速率,认为与不同相容剂对PP结晶形态和结晶度有不同影响有关。The nano-CaCO3/PP composites were modified by three kinds of compatibilizers. The photo-oxidative behavior of PP-base composites was investigated using FT-IR. The results indicated that the photo-oxidation mechanism of PP was not modified by nano-CaCO3, but the rate of the oxidation dramatically enhanced. The addition of macromolecular compatabilizers had different effect on the photo-oxidative degradation of nano-CaCO3/PP composites. Addition of POE-g-MA and EVA-g-MA increased the rate of photo-oxidation of nano-CaCO3/PP composites, while addition of PP-g-MA reduced the rate of photo-oxidation of nano-CaCO3/PP composites. These properties were probably dependent on the morphology and crystallinity of PP in the composites.

关 键 词：大分子 相容剂 纳米CACO 聚丙烯 光氧老化行为 

分 类 号：O631.33[理学—高分子化学]