The effect of silicon and phosphorus on the thermo-oxidative degradation of poly(methyl methacrylate)

被引：8
|
作者：
Chang, TC [1 ]
Wu, KH [1 ]
机构：
[1] Chung Cheng Inst Technol, Dept Appl Chem, Tao Yuan 335, Taiwan
来源：
POLYMER DEGRADATION AND STABILITY | 1997年 / 57卷 / 03期
关键词：
D O I：
10.1016/S0141-3910(97)00027-X
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The thermo-oxidative degradation of poly(methyl methacrylate) (PMMA), polydimethylsiloxane block poly(methyl methacrylate) copolymer (PDMS-b-PMMA) and phosphorus functionalized poly(methyl methacrylate) (DEVP-PMMA) were studied by using thermogravimetric analysis (TGA) in oxidizing (air) atmosphere. The apparent activation energies for thermo-oxidative degradation of these copolymers were calculated by the Ozawa method, and compared with values for thermal degradation. The average activation energies for the 10-70% conversion in air were found to be in the order of PMMA > PDMS-b-PMMA > DEVP-PMMA. In addition, the average activation energies for PDMS-b-PMMA and PMMA in air were lower than that in nitrogen, whereas the average activation energy for DEVP-PMMA in air was greater than that in nitrogen. (C) 1997 Elsevier Science Limited.
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页码：325 / 330
页数：6
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