中国塑料 ›› 2009, Vol. 23 ›› Issue (01): 91-94 .DOI: 10.19491/j.issn.1001-9278.2009.01.020

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聚丙烯接枝马来酸酐热稳定性能的研究

韩伟恒,吴海萍,殷德树,俞 强   

  1. 江苏工业学院材料科学与工程学院,江苏 常州 213164
  • 收稿日期:2008-09-11 修回日期:1900-01-01 出版日期:2009-01-26 发布日期:2009-01-26

Thermal Stability of Polypropylene-graft-Maleic Anhydride

HAN Wei-heng, WU Hai-ping, YIN De-shu, YU Qiang   

  1. School of Materials Science and Engineering, Jiangsu Polytechnic University, Changzhou 213164, China
  • Received:2008-09-11 Revised:1900-01-01 Online:2009-01-26 Published:2009-01-26
  • Contact: YU Qiang

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 ℃。

关键词: 聚丙烯接枝马来酸酐, 热稳定性, 热降解

Abstract: Thermal decomposition of PP-g-MAH was studied using a thermogravimetric analyzer and the effects of grafting ratio, βchain 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 an MAH grafting ratio of 0.72 % increased by 28℃and its thermal decomposition rate constant at 420℃ decreased by 57.6%. Theβchain 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 make the initial decomposition temperature 4.3℃ lower.

Key words: polypropylene-graft-maleic anhydride, thermal stability, thermal degradation