文献类型：期刊文献

英文题名：Synthesis and Self-Assembly of Tadpole-Shaped Organic/Inorganic Hybrid Poly(N-isopropylacrylamide) Containing Polyhedral Oligomeric Silsesquioxane via RAFT Polymerization

作者：Zhang, Weian[1];Liu, Li[2];Zhuang, Xiaodong[1];Li, Xiaohui[1];Bai, Jinrui[1];Chen, Yu[1]

机构：[1]E China Univ Sci & Technol, Dept Chem, Adv Mat Lab, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Pharm, Shanghai 200240, Peoples R China

年份：2008

卷号：46

期号：21

起止页码：7049

外文期刊名：JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000260587100018)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 50503013) and Youth Foundation of East China University of Science and Technology. W. Zhang also acknowledges the Alexander von Humboldt Foundation for the support.

语种：英文

外文关键词：polyamides; polyhedral oligomeric silsesquioxane (POSS); poly(N-isopropylacrylamide); reversible addition-fragmentation chain transfer (RAFT); self-assembly; synthesis

摘要：Aminopropylisobutyl polyhedral oligomeric silsesquioxane (POSS) was used to prepare a POSS-containing reversible addition-fragmentation transfer (RAFT) agent. The POSS-containing RAFT agent was used in the RAFT polymerization of N-isopropylacrylamide (NIPAM) to produce tadpole-shaped organic/inorganic hybrid Poly(N-isopropylacrylamide) (PNIPAM). The results show that the POSS-containing RAFT agent was an effective chain transfer agent in the RAFT polymerization of NIPAM, and the polymerization kinetics were found to be pseudo-first-order behavior. The thermal properties of the organic/inorganic hybrid PNIPAM were also characterized by differential scanning calorimetry. The glass transition temperature (T-g) of the tadpole-shaped inorganic/organic hybrid PNIPAM was enhanced by POSS molecule. The self-assembly behavior of the tadpole-shaped inorganic/organic hybrid PNIPAM was investigated by atomic force microscopy and dynamic light scattering. The results show the core-shell nanostructured micelles with a uniform diameter. The diameter of the micelle increases with the molecular weight of the hybrid PNIPAM. Surprisingly, the micelle of the tadpole-shaped inorganic/organic hybrid PNIPAM with low molecular weight has a much bigger and more compact core than that with high molecular weight. (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46:7049-7061, 2008