文献类型：期刊文献

英文题名：Correlations between the free-volume properties and the miscibility of chitosan/polar polymers blend membranes

作者：Zeng Minfeng[1];Sun Xudong[1];Wang Yun[1];Yao Xiandong[1];Xiao Huiquan[1];Wang Baoyi[2];Qi Chenze[1]

机构：[1]Shaoxing Univ, Inst Appl Chem, Shaoxing 312000, Peoples R China;[2]Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

年份：2008

卷号：77

期号：9

起止页码：1062

外文期刊名：RADIATION PHYSICS AND CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000260203500013)、、EI(收录号：20084311656383)、Scopus(收录号：2-s2.0-54049107308)、WOS

基金：This work was supported by the Zhejiang Provincial Youth Teacher Foundation, Research Project Foundation (20061156) of the Education Department of Zhejiang Province, and the Shaoxing Key Discipline Foundation, China.

语种：英文

外文关键词：Miscibility; Free volume; Positron annihilation; Blends

外文摘要：The miscibility of chitosan (CS)/polar polymer blend membranes has been studied by positron annihilation and other methods. The miscibility of these two blend systems (CS/polyvinyl pyrrolidone (PVP) and CS/polyethylene glycol (PEG)) is good in the solution state clue to the hydrogen interaction between the functional groups of the studied polymers. However, the miscibility of these two blend systems in the solid state is better in the CS/PVP system than in the CS/PEG system. The differences in miscibility of such two blend systems in the solid state were powerfully demonstrated with positron annihilation lifetime spectroscopy (PALS) methods. The CS/PEG blend system had Much larger free-volume size and lower free-volume concentration. For their poorer interaction and phase separation fact, the molecules in the interfacial zone of the CS/PEG blend Lire less compact than the CS matrix. Therefore. the free-volume size in the interfacial zone was much larger than it in the CS matrix. (C) 2008 Published by Elsevier Ltd.