| 聚碳酸亚丙酯多元醇的降解机理 |
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| 引用本文： | 刘保华,张敏,余爱芳,陈立班. 聚碳酸亚丙酯多元醇的降解机理[J]. 高分子材料科学与工程, 2004, 20(3): 76-79 |
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| 作者姓名： | 刘保华 张敏 余爱芳 陈立班 |
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| 作者单位： | 中国科学院化学研究所,北京,100080;中国科学院广州化学研究所,广东,广州,510650;中国科学院广州化学研究所,广东,广州,510650 |
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| 基金项目： | 国家自然科学基金资助项目(29734120) |
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| 摘 要： | 研究了聚碳酸亚丙酯多元醇的降解,提出聚碳酸亚丙酯多元醇室温会发生解拉链降解和无规断链降解。解拉链降解主要在残余聚合催化剂作用下发生,光和热对该反应具有明显催化作用。无规断链降解放出二氧化碳,同时产生具有端烯基组分的化合物。根据实验提出了抑制降解的相应方法。
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| 关 键 词： | 二氧化碳 环氧化物 聚碳酸亚丙酯多元醇 降解 |
| 文章编号： | 1000-7555(2004)03-0076-04 |
| 修稿时间： | 2002-07-30 |
DEGRADATION MECHANISM OF POLY(PROPYLENE CARBONATE) POLYOLS |
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| LIU Bao-hua. DEGRADATION MECHANISM OF POLY(PROPYLENE CARBONATE) POLYOLS[J]. Polymer Materials Science & Engineering, 2004, 20(3): 76-79 |
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| Authors: | LIU Bao-hua |
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| Affiliation: | LIU Bao-hua~ |
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| Abstract: | Degradation of poly(propylene carbonate) polyols (PPC) was studied. It was revealed that the degradation consists of unzipping depolymerization and random chain breaking. The unzipping depolymerization results in a cyclic byproduct, propylene carbonate, and tends to occur in the presence of the residual polymerization catalyst, if not deactivated. It may be accelerated by raising the temperature or being exposed to light. The random chain breaking is seen as molecular weight decrease, CO_2 release, and unsaturated end group formation. The PPC resin was found to keep stable when stored under dark and cool conditions. |
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| Keywords: | carbon dioxide epoxides poly (propylene carbonate) polyols degradation |
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