Kinetic analysis of the thermo-oxidative degradation of poly(vinyl chloride) in poly(vinyl chloride)/methyl methacrylate-butadiene-styrene blends 1 - Isothermal degradation

被引：8
作者：
Andricic, B [1 ]
Kovacic, T [1 ]
Klaric, I [1 ]
机构：
[1] Univ Split, Fac Chem Technol, Dept Organ Chem Technol, Split 21000, Croatia
来源：
POLYMER DEGRADATION AND STABILITY | 2002年 / 78卷 / 03期
关键词：
isothermal kinetics; PVC/MBS blends; thermo-oxidative degradation;
D O I：
10.1016/S0141-3910(02)00186-6
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 thermal degradation of poly(vinyl chloride)/poly(methyl methacrylate-butadiene-styrene) (PVC/MBS) blends was investigated by means of isothermal thermogravimetry in air. During 120 min the main process in the blends is the dehydrochlorination of PVC. The reaction rate constants were determined by applying the Prout-Tompkins model, which assumes autocatalytic degradation. Their values are about three times higher in air than in nitrogen. MBS in such conditions retards the thermo-oxidative dehydrochlorination of PVC in the blends. Applying the Arrhenius equation, apparent activation energies and pre-exponential factors were calculated. Their relationship through compensation effect was discussed and a false compensation effect was found. (C) 2002 Elsevier Science Ltd. All rights reserved.
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收藏
页码：459 / 465
页数：7
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