醇相光引发RAFT分散聚合制备全丙烯酸酯二嵌段共聚物纳米材料  

Preparation of All-acrylic Diblock Copolymer Nano-objects via Alcoholic Photoinitiated RAFT Dispersion Polymerization

作　　者：刘冬冬 谭剑波[1] 张力[1] Liu Dong-dong;Tan Jian-bo;Zhang Li(School of Materials and Energy,Guangdong University of Technology,Guangzhou,510006,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《广东工业大学学报》2018年第5期80-85,共6页Journal of Guangdong University of Technology

基　　金：国家自然科学基金资助项目(21504017)

摘　　要：在40℃反应条件下,以聚丙烯酸羟乙酯(PHEA)为大分子RAFT试剂,丙烯酸异冰片酯(IBOA)为聚合单体,在乙醇/水混合溶剂中,通过光引发RAFT分散聚合制备全丙烯酸酯(PHEA_(25)-PIBOA_n)嵌段共聚物纳米材料.反应在可见光(λ_(max)=405 nm,0.4 mW/cm^2)照射下,30 min内达到很高的单体转化率(95%).聚合反应动力学结果表明反应主要分为两个阶段,凝胶渗透色谱结果表明聚合过程体现出良好的可控性.探究了嵌段共聚物纳米材料的形貌变化,成功得到了球形和囊泡结构形貌.All-acrylic poly(2-hydroxyethyl acrylate)-poly(isobornyl acrylate)(PHEA25-PIBOAn)block copolymer nano-objects were prepared by photoinitiated RAFT dispersion polymerization of IBOA in ethanol/water at 40°C using a PHEA macromolecular chain transfer agent(macro-CTA).Polymerizations proceeded rapidly upon exposure to visible light irradiation(λmax=405 nm,0.4 mW/cm2)with high monomer conversion(95%)being achieved within 30 min.The kinetics of polymerization indicated that the polymerization could be separated into two stages.Gel permeation chromatography(GPC)analysis demonstrated that good control was maintained throughout the photo-PISA process,and the final block copolymers exhibited relatively low polydispersities(Mw/Mn 1.50).Spherical micelles and vesicles were prepared by this method.

关 键 词：光引发 RAFT分散聚合 嵌段共聚物 

分 类 号：TQ316.31[化学工程—高聚物工业]