| 用三氟化硼引发体系制备聚丁二醇 |
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| 引用本文： | 张阿方,张鸿志.用三氟化硼引发体系制备聚丁二醇[J].应用化学,1991,8(2):94-96. |
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| 作者姓名： | 张阿方 张鸿志 |
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| 作者单位： | 河南化学研究所，北京大学化学系，河南化学研究所，北京大学化学系 郑州，北京 100871，郑州，北京 100871 |
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| 摘 要： | 分子量在3000以下特别是1000或2000的聚丁二醇(PTMG)是制备嵌段聚醚聚氨酯及嵌段聚醚聚醋弹性体的重要软段原料。用三氟化硼(BF_3)体系引发制备PTMG巳有报道,但尚难在工业上采用,主要是引发效率低。前已报道,BF_3-环氧氯丙烷(ECH)体系的引发效率比BF_3-环氧乙烷(EO)体系高2.5～6倍,比BF_3-环氧丙烷(PO)体系高2～3倍。本文用BF_3-ECH为引发体系,并用水为分子量调节剂制备分子量1000或2000的PTMG,测
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| 关 键 词： | 四氢呋喃 聚丁二醇 三氟化硼 开环聚合 阳离子聚合 |
| 收稿时间： | 1990-03-16 |
PREPARATION OF POLYTETRAMETHYLENE GLYCOL BY BF_3 SYSTEM |
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| Zhang Afang,Zhang Hongzhi,Yang Huichang,Feng Xinde.PREPARATION OF POLYTETRAMETHYLENE GLYCOL BY BF_3 SYSTEM[J].Chinese Journal of Applied Chemistry,1991,8(2):94-96. |
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| Authors: | Zhang Afang Zhang Hongzhi Yang Huichang Feng Xinde |
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| Institution: | Zhang Afang,Zhang Hongzhi,Yang Huichang,Feng Xinde Department of Chemistry,Peking university,Beijing 100871 |
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| Abstract: | The effects of water on the molecular weight and yield of polytetramethylene glycol(PTMG) prepared from tetrahydrofuran by using BF_3-etherate and epichlorohydrin(ECH)asinitiator system were studied. The high yield of of PTMG with controlled average molecularweight of 1000-2000 can be obtained by delating the time of adding water. The once-through yield was around 60-80% and the ultimate yield reached 90% for PTMG of mole-cular weightaround 2000. The segmented polyurethane with high mechanical propertieswas prepared thereby. |
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| Keywords: | tetrahydrofuran polytetramethylene glycol boron fluoride ring opening polymerization cationic polymerization |
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