聚丙烯接枝马来酸酐热稳定性能的研究  

Thermal Stability of Polypropylene-graft-Maleic Anhydride

作　　者：韩伟恒[1] 吴海萍[1] 殷德树[1] 俞强[1] 

机构地区：[1]江苏工业学院材料科学与工程学院,江苏常州213164

出　　处：《中国塑料》2009年第1期91-94,共4页China Plastics

摘　　要：采用热失重方法研究了聚丙烯接枝马来酸酐(PP-g-MAH)的热分解行为,考察了MAH接枝率、PP降解程度和残余MAH单体对PP-g-MAH热稳定性能的影响。结果表明,MAH的接枝可以提高PP的热稳定性能。与PP相比,接枝率为0.72%的PP-g-MAH起始分解温度升高28℃,420℃时的热分解速率常数下降57.6%;接枝过程中PP分子链的降解对PP-g-MAH热稳定性能有不利影响。与降解程度最小的PP-g-MAH相比,降解程度最大的PP-g-MAH起始分解温度降低了20℃,420℃时的热分解速率常数增加了115%;PP-g-MAH中残留的MAH使其起始分解温度降低了4.3℃。Thermal decomposition of PP-g-MAH was studied using a thermogravimetric analyzer and the effects of grafting ratio, β chain scission and maleic anhydride residue on the thermal stability of PP-g-MAH were investigated. The results indicated that the grafting of MAH improved the thermal stability of PP. Compared with the virgin PP, thermal decomposition temperature of PP-g-MAH with MAH grafting ratio of 0.72 % increased by 28 ℃ and its thermal decomposition rate constant at 420 ℃ decreased by 57. 6 %. The β chain scission and degradation that occurred during the melt grafting process injured thermal stability of the resulting PP-g-MAH. By contrast with minimum degradation of the graft, thermal decomposition temperature of maximum one decreased by 20 ℃ and its thermal decomposition rate constant at 420 ℃ increased by 115 %. Maleic anhydride remaining in the grafted PP made the initial decomposition temperature 4. 3 ℃ lower.

关 键 词：聚丙烯接枝马来酸酐 热稳定性 热降解 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]