| 杂多酸引发四氢呋喃开环聚合反应Ⅵ.以环氧氯丙烷为促进剂 |
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| 引用本文： | 陈宇,张广利,张鸿志.杂多酸引发四氢呋喃开环聚合反应Ⅵ.以环氧氯丙烷为促进剂[J].高分子学报,2000,35(3):372-374. |
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| 作者姓名： | 陈宇 张广利 张鸿志 |
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| 作者单位： | 北京大学化学与分子工程学院 |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目!(基金号 980 0 0 12 2 ) |
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| 摘 要： | 在以低浓度杂多酸(ＨＰＡ)催化四氢呋喃(ＴＨＦ)聚合反应中,我们曾采用环氧乙烷(ＥＯ)和环氧丙烷(ＰＯ)为促进剂,发现它们都具有很好的促进效果1,2],并且活性相近.在以三氟化硼(ＢＦ3)为催化剂的四氢呋喃正离子开环聚合反应中,促进剂的活性次序为:ＥＣＨ(环氧氯丙烷)>ＰＯＥＯ3].在ＨＰＡ催化ＴＨＦ聚合反应中,ＥＣＨ是否仍具有高的促进活性是本文研究的目的.1 原料及聚合操作ＴＨＦ的纯化见文献4],ＥＣＨ的纯化见文献5],十二磷钨杂多酸(ＰＷ12)的处理见文献1],三氟醋酸酐的合成方法和聚合反应的操作均见前文2].2 分析测试核磁共振…
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| 关 键 词： | 杂多酸 四氢呋喃 环氧氯丙烷 促进剂 |
TETRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID VI. EPICHLOROHYDRIN AS PROMOTER |
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| CHEN Yu,ZHANG Guangli,ZHANG Hongzhi.TETRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID VI. EPICHLOROHYDRIN AS PROMOTER[J].Acta Polymerica Sinica,2000,35(3):372-374. |
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| Authors: | CHEN Yu ZHANG Guangli ZHANG Hongzhi |
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| Abstract: | The polymerization of tetrahydrofuran(THF) initiated by heteropolyacid—H 3PW 12 O 40 (PW 12 ) in low concentrations could be effectively promoted by epichlorohydrin(ECH).However, the promotion activity of ECH is lower than that of EO or PO, especially when water was introduced. The polymerization started upon addition of epichlorohydrin.When the polymerization has stopped, it could be re\|initiated with the addition of a new portion of ECH. The products were found to be copolyether glycols with hydroxyl groups at both ends.The percentage of the hydroxyl group attached to ECH moieties at the polymer chain\|ends was higher than 50% of the total hydroxyl end\|groups. Most of the ECH moieties in chains attached to hydroxyl end groups, and no primary hydroxyl groups derived from ECH could be detected. |
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| Keywords: | Tetrahydrofuran Epichlorohydrin Heteropolyacid Promoter |
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