杂多酸引发四氢呋喃开环聚合反应Ⅶ.以氧杂环丁烷为促进剂  

TETRAHYDROFURAN POLYMERIZATION INITIATED BY HETEROPOLYACID Ⅶ. OXETANE AS PROMOTER

作　　者：陈宇[1] 陈铮铮 张广利[1] 张鸿志[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871

出　　处：《高分子学报》2000年第4期506-509,共4页Acta Polymerica Sinica

基　　金：高等学校博士学科点专项科研资助!项目 (项目号 980 0 0 12 2 )

摘　　要：The polymerzation of tetrahydrofuran (THF) initiated by heteropolyacid—H\-3PW\-\{12\}O\-\{40\} in low concentration could be promoted by oxetane (OX), but the polymerization stopped at lower conversion than that promoted by oxiranes. The chain structure analysis by NMR spectra showed that OX was more reactive toward polymerization than oxiranes and more than 80% of OX were consumed through copolymerization, but not initiation. By stepwise addition of OX the conversion of THF polymerization could be increased higher than 50%. The percentage of the hydroxyl group attached to OX moieties at the polymer chain\|ends was higher than 50% of the total hydroxyl end\|groups, inferring that polymerization proceeded quite similar to that promoted by ethylene oxide and each chain was started with the OX moiety.The polymerzation of tetrahydrofuran (THF) initiated by heteropolyacid—H\-3PW\-\{12\}O\-\{40\} in low concentration could be promoted by oxetane (OX), but the polymerization stopped at lower conversion than that promoted by oxiranes. The chain structure analysis by NMR spectra showed that OX was more reactive toward polymerization than oxiranes and more than 80% of OX were consumed through copolymerization, but not initiation. By stepwise addition of OX the conversion of THF polymerization could be increased higher than 50%. The percentage of the hydroxyl group attached to OX moieties at the polymer chain\|ends was higher than 50% of the total hydroxyl end\|groups, inferring that polymerization proceeded quite similar to that promoted by ethylene oxide and each chain was started with the OX moiety.

关 键 词：杂多酸 四氢呋喃 氧杂环丁烷 促进剂 开环聚合 

分 类 号：O631[理学—高分子化学]