文献类型：期刊文献

英文题名：Spectroscopic study of ordered structures of atactic poly(methyl methacrylate) freeze-extracted from poly(ethylene glycol) solution

作者：Chen, JL; Zheng, GS; Xu, L; Zhang, J; Lu, Y; Xue, G; Yang, YS

机构：[1]Nanjing Univ, Dept Chem, State Key Lab Funct Polymer Mat Adsorpt & Separat, Nanjing 210093, Peoples R China;[2]E China Univ Sci & Technol, Petrochem Inst, Shanghai 200540, Peoples R China

年份：2001

卷号：42

期号：9

起止页码：4459

外文期刊名：POLYMER

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000167050400057)】；

语种：英文

外文关键词：atactic poly(methyl methacrylate); ordered structure; self-aggregate

摘要：The conformation of atactic poly(methyl methacrylate) (a-PMMA) freeze-extracted from solvents of various molecular size was investigated by IR and Raman spectroscopy. IR studies showed that self-aggregates and partial helix conformation of polymer chain existed in the annealed a-PMMA sample freeze-extracted from a-PMMA/poly(ethylene glycol) (PEG) solution. Temperature dependence of IR I-1240 (cm-1)/I-1270 (cm-1), ratio indicated that a-PMMA freeze-extracted from PEG had lower backbone conformational energy than that from dioxane, FT-Raman spectroscopies showed that strong interaction existed between a-PMMA and dioxane, while little solute-solvent interaction existed in the a-PMMA/PEG system. (C) 2001 Elsevier Science Ltd. All rights reserved.