温敏性嵌段聚合物的自组装性能  

Self-Assembling Property of Thermo-Sensitive Block Polymer

作　　者：熊太仔[1] 李素华[1] 冷彩凤[1] 袁坤山[1] 闫绍鹏[1] 于跃芹[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《胶体与聚合物》2013年第2期63-66,共4页Chinese Journal of Colloid & Polymer

基　　金：山东省自然科学基金(ZR2012BM015);青岛市科技计划基础研究项目(09-1-3-33-JCH)

摘　　要：利用可逆加成-断裂链转移自由基聚合法(RAFT)制备了聚N-异丙基丙烯酰胺/聚丙烯酸乙酯(PNIPAM/PEA)的ABA型和BAB型三嵌段聚合物(A=PNIPAM,B=PEA),考察了共聚物的自组装性能和温度响应性能,探讨了各嵌段组分的用量和嵌段序列对共聚物性能的影响。结果表明:三嵌段共聚物都具有良好的温敏性和自组装性能;BAB型嵌段聚合物溶液的LCST值随着疏水组分PEA的增多呈现先增大后降低;在相同温度下,BAB型的胶束粒径明显小于ABA型的胶束粒径,并能在较低温度下发生相转变。ABA and BAB well-defined triblock copolymers of poly （N-isopropyl acrylamide） / polyethylacrylate （PNIPAM/PEA） were synthesized by reversible addition-fragmentation chain transfer （RAFT） （A = PNIPAM, B = PEA）. Self-assembling property and temperature response property of copolymer were systematically investigated through the surface tensiometer, spectrophotometer, dynamic light scattering method; the effects of the amount of each block components and block order on polymer properties were discussed respectively. The results showed that the triblock copolymers have good thermo-sensitive and self-assembling property. The LCST value of BAB triblock polymer solution first increased and then decreased with the increase of hydrophobic PEA content. Under the same temperature, micelle sizes of the BAB were less than ABA＇s obviously, and realized volume phase transition under lower temperature.

关 键 词：可逆加成-裂解链转移聚合 温敏性嵌段聚合物 自组装 嵌段序列 

分 类 号：O648[理学—物理化学]