Synthesis of block copolymer poly (n-butyl acrylate)-b-polystyrene by DPE seeded emulsion polymerization with monodisperse latex particles and morphology of self-assembly film surface.
Synthesis of block copolymer poly (n-butyl acrylate)-b-polystyrene by DPE seeded emulsion polymerization with monodisperse latex particles and morphology of self-assembly film surface.
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DOI：
10.1016/j.jcis.2012.01.030
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发表时间：
2012-05
影响因子：
9.9
通讯作者：
Wenwen Wang;Qiuyu Zhang
中科院分区：
文献类型：
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作者：
Wenwen Wang;Qiuyu Zhang
采用一种新型链转移活性剂DPE（1，1-二苯基乙烯），采用种子乳液聚合法，在环境友好介质中合成了高分子量聚（丙烯酸正丁酯）-b-聚苯乙烯（PnBA-b-PSt）。首先制备含P（nBA-DPE）前驱体的种子胶乳，然后将第二单体苯乙烯溶胀成种子胶乳粒子，以高转化率得到嵌段共聚物。采用FTIR、1H NMR和SEC对前驱体和嵌段共聚物的结构和分子量进行了表征。透射电子显微镜（TEM）和激光光散射（LLS）结果表明，所得乳胶粒子为单分散乳胶粒。用原子力显微镜（AFM）研究了嵌段共聚物膜表面的自组装形态。DSC曲线中两个玻璃化转变的观察证实了相分离的存在。
Synthesis of poly (n-butyl acrylate)-b-polystyrene (PnBA-b-PSt) with high molecular weight in an environmentally benign medium was carried out in seeded emulsion polymerization, using a novel chain transfer active DPE (1,1-diphenylethylene) agent. Seed latex containing precursor P(nBA-DPE) was prepared first, and the second monomer styrene was swelled into seed latex particles, yielding block copolymer at high conversion. Structures as well as molecular weight of precursor and block copolymer were characterized by FTIR,1H NMR, and SEC, respectively. Furthermore, Transmission Electron Microscopy (TEM) observation and Laser Light Scattering (LLS) manifested that monodisperse latex particles were obtained. Self-assembly morphology of block copolymer membrane surface was examined by atom force microscopy (AFM). Phase separation was observed clearly, which was confirmed by the observation of two glass transitions in DSC curve.