| 三氟化硼引发四氢呋喃聚合的研究——Ⅳ.1,4-丁二醇的影响 |
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| 引用本文： | 张阿方,张鸿志,杨惠昌,冯新德. 三氟化硼引发四氢呋喃聚合的研究——Ⅳ.1,4-丁二醇的影响[J]. 高分子学报, 1989, 0(5) |
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| 作者姓名： | 张阿方 张鸿志 杨惠昌 冯新德 |
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| 作者单位： | 河南化学研究所 郑州(张阿方，杨惠昌)，北京大学化学系 北京(张鸿志)，北京大学化学系 北京(冯新德) |
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| 摘 要： | 前报中已证明用三氟化硼-环氧氯丙烷(ECH)引发四氢呋喃(THF)聚合具有较高的引发效率,并对在Ac_2O、水和无水存在下的聚合反应进行了研究。本文报道1,4-丁二醇(BG)对BF_3引发THF聚合反应的影响。通常认为在BG存在下,BF_3是不能引发THF聚合的,但本工作证明BG是有效的分子量调节剂,制备分子量在
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| 关 键 词： | 正离子聚合 开环聚合 四氢呋喃 1 4-丁二醇 三氟化硼-乙醚 环氧氯丙烷为聚合促进剂 |
POLYMERIZATION OF TETRAHYDROFURAN BY BORON TRIFIUORIDE INITIATED |
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| IV Effect of Butylene Glycol ZHANG Afang,ZHANG Hongzhi YANG Huichang and FENG Xinde. POLYMERIZATION OF TETRAHYDROFURAN BY BORON TRIFIUORIDE INITIATED[J]. Acta Polymerica Sinica, 1989, 0(5) |
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| Authors: | IV Effect of Butylene Glycol ZHANG Afang ZHANG Hongzhi YANG Huichang FENG Xinde |
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| Abstract: | The molecular weight of polytetramethylene glycol (PTMG) prepared from tetrahydrofu-ran (THF) by using cocatalysts of BF3-etherate and epichlorohydrin (ECH) in the presence of butylene glycol(BG) increased sharply with the polymer conversion, but at yields higher than 80% but could be exactly controlled by the molar ratio of BG to BF3. The polyether obtained possessed around 70 mol% primaly hydrcxyl end-groups and a hydroxyl end-group functionality of two. The content of ECH derived units in each polymer chain containing 18.2 or 33.8 THF derived units is around 1.60 or 2.16, respectively. |
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| Keywords: | Cationic polymerization Tetrahydrofuran Ring-opening polymerization Butylene glycol Borontrifluoride etherate Epicblorohydrin as polymerization promotor Poly-tetrahydrofuran |
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