窄分子量分布双亲性嵌段共聚物PEO-b-PtBA的合成及其水解  

Synthesis of amphiphilic copolymer PEO-b-PtBA with narrow molecular weight distribution and its hydrolysis

作　　者：库里松.哈衣尔别克 呼德拉提.阿那斯 阿孜古丽.木尔赛力木[1] 

机构地区：[1]新疆师范大学化学化工学院,乌鲁木齐830054 [2]新疆维吾尔自治区水产科学研究所,乌鲁木齐830052

出　　处：《华东师范大学学报（自然科学版）》2015年第3期116-123,共8页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金青年项目(21104063);国家自然科学基金地区基金项目(21165018)

摘　　要：以PEO-Br为大分子引发剂,通过ATRP法合成了一组两亲性两嵌段共聚物PEO45-bPtBAx(x=28,35,53).采用HNMR、FTIR、SEC和TEM对产物进行了表征,讨论了投料比对控制产物的分子链结构,分子量及其分布的影响.结果表明,tBA的转化率较高,1 H NMR结果显示成功制得目标产物,所得嵌段共聚物均具有极窄的分子量分布(Mw/Mn≤1.07).在tBA相对于PEO-Br的投料比较小时可以对嵌段共聚物结构进行精确调控.tBA投入量的增大会导致分子量分布变宽及引发效率下降.PEO45-b-PtBA35被成功水解为PEO45-b-PAA35,在中性水溶液中PEO45-b-PAA35自组装形成了分散较为均匀的球形胶束.A group of amphiphilic diblock copolymers PEO45-b-PtBAx（x=28,35,53）were synthesized by ATRP using PEO-Br as macroinitiator.Samples were characterized by SEC,1 H NMR,FTIR and TEM.The influence of feed ratio to the control of the structure,molecular weight and molecular weight distributions were discussed.The results showed that,the conversion of tBA was high and the 1 H NMR results confirmed the targeted products were synthesized successfully.All three copolymers had a narrow molecular weight distributions（Mw/Mn ≤1.07）.When the feed ratio of tBA to PEO-Br was low,the structures of copolymers could be controlled accurately.The increase of feed ratio of tBA to PEO-Br caused broadening of molecular weight distributions and the decreasing of initiating efficiency.The hydrolysis of PEO45-b-PtBA35to PEO45-b-PAA35 was performed successfully.PEO45-b-PAA35 was self-assembled into well dispersed spherical micelles in neutral aqueous solution.

关 键 词：双亲性嵌段共聚物 ATRP聚合 PEO-PtBA 水解 

分 类 号：TQ314.2[化学工程—高聚物工业]