CAJ | 학술논문

采用一步可逆加成－断裂链转移（RAFT）聚合法合成了一系列分子量可控、分子量分布较窄的两亲性嵌段共聚物PEG－b－P（St－co－VBC），并通过凝胶渗透色谱（GPC）、核磁共振谱（NMR）、傅立叶变换红外光谱（FT－IR）和示差扫描量热仪（DSC）对所合成的嵌段共聚物进行了相关表征。结果表明，通过控制聚合单体中对氯甲基苯乙烯（VBC）和苯乙烯（St）的摩尔比，可以实现对两亲性嵌段共聚物PEG－b－P（St－co－VBC）中VBC重复单元的精确控制。随着嵌段共聚物中VBC含量的增加，PEG－b－P（St－co－VBC）的玻璃化转变温度逐渐升高。
채용일보가역가성－단렬련전이（RAFT）취합법합성료일계렬분자량가공、분자량분포교착적량친성감단공취물PEG－b－P（St－co－VBC），병통과응효삼투색보（GPC）、핵자공진보（NMR）、부립협변환홍외광보（FT－IR）화시차소묘량열의（DSC）대소합성적감단공취물진행료상관표정。결과표명，통과공제취합단체중대록갑기분을희（VBC）화분을희（St）적마이비，가이실현대량친성감단공취물PEG－b－P（St－co－VBC）중VBC중복단원적정학공제。수착감단공취물중VBC함량적증가，PEG－b－P（St－co－VBC）적파리화전변온도축점승고。
Amphiphilic block copolymers PEG-b -P(St-co-VBC)with controllable molecular weight and low polydispersity were synthesized by one-step reversible addition-fragmentation transfer(RAFT).The structure and property of the synthesized amphiphilic copolymers were characterized by GPC,NMR,FT-IR and DSC.The results showed that the number of vinylbenzyl chloride (VBC)units in amphiphilic block copolymers PEG-b -P (St -co -VBC ) can be well tuned by controlling the mole ratio of VBC and Styrene (St ). Moreover,the glass transition temperature of PEG -b -P(St -co -VBC)is gradually increased with the addition of VBC units in block copolymers.