超强分凝含氟嵌段共聚物的RAFT合成及其自组装行为  

Synthesis of Fluorinated Block Copolymers by RAFT and Their Self-assembly in Solution

作　　者：王文彬[1,2] 武元鹏[1] 潘毅[1] 邓瑾妮[1] 郑朝晖[1] 丁小斌[1] 

机构地区：[1]中国科学院成都有机化学研究所,四川成都610041 [2]中国科学院研究生院,北京10039

出　　处：《合成化学》2011年第5期605-609,613,共6页Chinese Journal of Synthetic Chemistry

摘　　要：单羟基聚乙二醇(mPEG)与端羧基链转移剂S-十二烷基-S-′(α,α′-二甲基-α″-乙酸)三硫代碳酸酯[DDMAT(1)]经酯化反应制得大分子链转移剂[mPEG-DDMAT(2)];以2为链转移剂,用AIBN引发1H,1H,2H,2H-全氟癸基丙烯酸酯(FA)的可逆加成-断裂链转移聚合(RAFT),合成了嵌段间强烈不相容的亲水/亲氟双亲嵌段共聚物[mPEG-b-PFA(3a^3k)。3在溶液中的自组装行为研究结果表明,3 f在D2O中PFA聚集形成核,mPEG形成冠层;3 j在正丙醇中自组装得到伸直状的珍珠项链状聚集体。A macromolecular chain transfer agent, mPEG-DDMAT （2）, was prepared by esterification of mPEG with S-l-dodecyl-S＇-（ α, α＇-dimethyl-α＂-acetic acid） trithiocarbonate （DDMAT）. Am- phiphilie fluorinated block copolymers, methoxy poly （ ethylene glycol） - block/poly （ 1 H, 1H,2H, 2H- perfluorodecyl acrylate）[ mPEG-b-PFA （3a - 3k）], were synthesized by reversible addition-fragmentation chain transfer polymerization（RAFT） of 1H, 1H,2H,2H-perfluomdeeyl acrylate（FA） in a, α, α-trifluorotoluene in the presence of AIBN as the initiators and 2 as chain transfer agent. Self-assembly behavior of 3 in solution was investigated. The results showed that aggregates formed by self-assembly of 3f in D2O consist of mPEG corona and PFA core and Pearl-necklace-like aggregates were identified from the self-assembly of 3j in propanol.

关 键 词：含氟嵌段共聚物 可逆加成-断裂链转移 自组装 珍珠项链状聚集体 合成 

分 类 号：O631[理学—高分子化学] TQ311[理学—化学]