کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5203591 | 1381935 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and thermal degradation of poly(vinyl chloride) synthesized by various polymerization catalyst
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Relationship between the structure and the thermal stability of poly(vinyl chloride) synthesized by various polymerization catalysts was investigated. The CpâTi(OPh)/MAO catalyst, n-butyllithium (n-BuLi), the Cu(0)/TREN/CHBr3/DMSO catalyst, benzoyl peroxide/N,N-dimethylaniline (BPO/DMA), 2,2'-azobis(2.4-dimethylvaleronitrile) (V-65) was used as the polymerization catalyst. The temperature of 5% weight loss was in the following order; CpâTi(OPh)3/MAO (280 °C) > n-BuLi (264 °C) > V-65 (249 °C) > Cu(0)/TREN/CHBr3/DMSO (215 °C) > BPO/DMA (209 °C), and the rate of weight loss was the reverse order of Tâ5% in the isothermal degradation of the polymer from 160 °C to 220 °C. The Tâ5% value of the polymer obtained from the polymerization with CpâTi(OPh)3/MAO catalyst increased with an increase of the molecular weight of PVC, in contrast to that PVC obtained with the radical initiator did not depend on the molecular weight of the polymer. The Tâ5% value of PVC macromonomer was 285 °C, while the temperature of non-functionalized PVC was 262 °C, respectively. It is clear that the PVC macromonomer had a good thermal stability regardless of low-molecular weight.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 96, Issue 7, July 2011, Pages 1321-1326
Journal: Polymer Degradation and Stability - Volume 96, Issue 7, July 2011, Pages 1321-1326
نویسندگان
Yoshikatsu Tsuchiya, Kiyoshi Endo,