杂多酸引发四氢呋喃开环聚合反应Ⅷ.以1,1,1-三羟甲基丙烷为分子量调节剂  

TETRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID Ⅷ. 1,1,1-TRIHYDROXYMETHYLENEPROPANE AS MOLECULAR WEIGHT CONTROLLER

作　　者：陈宇[1] 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》2001年第2期269-273,共5页Acta Polymerica Sinica

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

摘　　要：Polyether triol with molecular weight distribution index being 1\^3～1\^5 was prepared in yield around 50% by tetrahydrofuran polymerization using heteropolyacid\|H\-3PW 12 O 40 and ethylene oxide as initiator system and 1,1,1\|trihydroxymethylenepropane(TMP) as molecular weight controller.The average hydroxyl functionality was estimated by end\|group analysis and VPO to be close or equal to 3. The 1H NMR spectra showed that about 1/3 hydroxyl of TMP did not react with the propagating chains in the THF polymerization.Each of the unreacted hydroxyl groups of TMP attached to the middle or to the end of a diol chain as a pendent primary hydroxyl group forming the obtained polyether triol. All the hydroxyls of polyether triol were verified to be active enough towards 4,4′ methylene bis(phenyl isocynate) in the preparation of polyurethanes.Polyether triol with molecular weight distribution index being 1\^3～1\^5 was prepared in yield around 50% by tetrahydrofuran polymerization using heteropolyacid\|H\-3PW 12 O 40 and ethylene oxide as initiator system and 1,1,1\|trihydroxymethylenepropane(TMP) as molecular weight controller.The average hydroxyl functionality was estimated by end\|group analysis and VPO to be close or equal to 3. The 1H NMR spectra showed that about 1/3 hydroxyl of TMP did not react with the propagating chains in the THF polymerization.Each of the unreacted hydroxyl groups of TMP attached to the middle or to the end of a diol chain as a pendent primary hydroxyl group forming the obtained polyether triol. All the hydroxyls of polyether triol were verified to be active enough towards 4,4′ methylene bis(phenyl isocynate) in the preparation of polyurethanes.

关 键 词：杂多酸 四氢呋喃 1 1 1-三羟甲基丙烷 环氧乙烷 分子量调节剂 开环聚合 聚氨酯 催化剂 

分 类 号：O631.5[理学—高分子化学]