| SBS三嵌段共聚物在丁酮溶剂中的降解 |
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| 引用本文： | 杨荣杰,李玄,叶美玲,施良和. SBS三嵌段共聚物在丁酮溶剂中的降解[J]. 高分子学报, 1991, 0(5): 572-576 |
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| 作者姓名： | 杨荣杰 李玄 叶美玲 施良和 |
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| 作者单位： | 中国科学院化学研究所，中国科学院化学研究所，中国科学院化学研究所，中国科学院化学研究所 北京 100080，北京 100080，北京 100080，北京 100080 |
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| 基金项目： | 国家自然科学基金，中国科学院高分子物理开放实验室资助 |
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| 摘 要： | 论文研究了SBS三嵌段共聚物在选择性溶剂丁酮中的降解。采用超速离心沉降速度法、毛细管粘度法、GPC和IR的研究手段,证实了SBS/丁酮溶液存放时间较长时,溶液中SBS分子发生降解,降解发生在聚丁二烯嵌段的不饱和双键。从而也表明SBS/丁酮溶液中胶束行为的不稳定归国于SBS分子的降解。
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| 关 键 词： | SBS嵌段共聚物 降解 丁酮 |
| 收稿时间： | 1990-05-16 |
DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT |
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| YANG Rong-jie,LI Xuan,YE Mei-ling,SHI Liang-he. DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT[J]. Acta Polymerica Sinica, 1991, 0(5): 572-576 |
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| Authors: | YANG Rong-jie LI Xuan YE Mei-ling SHI Liang-he |
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| Affiliation: | Institute of Chemistry; Academia Sinica; Beijing; Post code: 100080 |
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| Abstract: | SBS molecules can micellize in methylethyl ketone (MEK) under certain conditions. But the behavior of micellization was found to be instable. In this paper, GPC,IR, ultracentrifuga-tion and viscometry were used to study the instability. It was pointed out that SBS molecules were degradated in MEK solvent when solution was stored in air for a long time. The reason is that ketone is easy to yield free radicals by ultra-violet ray and the free radicals accelerate oxidation and degradation of double bond C=C of PB block in the SBS molecules. |
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| Keywords: | SBS triblock copolymer Degradation Methylethyl ketone |
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