CAJ | 학술논문

采用3种新式引发剂,即2-（苄氧基）乙醇钾、2-（四氢-2H-吡喃-2-氧基）乙醇钾、单丙烯基乙二醇钾引发环氧乙烷阴离子开环聚合,反应条件为25℃、48 h、醇与萘钾摩尔比例1∶1,得到3种异端基遥爪聚乙二醇。以2-（苄氧基）乙醇钾引发聚合所得产物为起始物,经一系列反应,得到两种两端均为活性基团的异端基遥爪聚乙二醇,这种方法具有普适性。通过1HNMR及GPC手段,表征了产物的结构、分子量及分子量分布。结果表明可以得到高产率、分子量可控且分布窄的异端基遥爪聚乙二醇。
채용3충신식인발제,즉2-（변양기）을순갑、2-（사경-2H-필남-2-양기）을순갑、단병희기을이순갑인발배양을완음리자개배취합,반응조건위25℃、48 h、순여내갑마이비례1∶1,득도3충이단기요조취을이순。이2-（변양기）을순갑인발취합소득산물위기시물,경일계렬반응,득도량충량단균위활성기단적이단기요조취을이순,저충방법구유보괄성。통과1HNMR급GPC수단,표정료산물적결구、분자량급분자량분포。결과표명가이득도고산솔、분자량가공차분포착적이단기요조취을이순。
Three hetero telechelic poly(ethylene glycol)s were obtained via anionic ring-opening polymerization of ethylene oxide using three new initiators :2-(benzyloxy)ethanol potassium、 2-(tetrahydro-2H-pyran-2-yloxy)ethanol potassium,2-allyloxyethanol potassium.The polymerization conditions were as follows:25 ℃,48 h,with equal ethanol and potassium naphthalene feeds.Using the polymerized product from 2-(benzyloxy)ethanol potassium as the start substance,two hetero telechelic poly(ethylene glycol)s with two functional end groups were synthesized through a series of reactions,the method was widely applicable to synthesizing hetero telechelic poly(ethylene glycol)s.The chemical structure,weight average molecular weight and distribution of the resultant products were characterized by 1H-NMR and GPC.The hetero telechelic poly(ethylene glycol)s that have high yields and controlled molecular weights and molecular weight distributions were obtained.