文献类型：期刊文献

英文题名：Studies of Relationship Between Polymer Structure and Hydration Environment in Amphiphilic Polytartaramides

作者：Chi, Yongmei[1,2];Xu, Songjie[1];Xu, Xin[1];Cao, Yuting[2];Dong, Jian[1,2]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China

年份：2017

卷号：55

期号：2

起止页码：138

外文期刊名：JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS

收录：SCI-EXPANDED(收录号：WOS:000393754900003)、、EI(收录号：20164502980007)、Scopus(收录号：2-s2.0-84993967767)、WOS

基金：This work was financially supported by the National Natural Science Foundation of China (21674063 and 20974063), Natural Science Foundation of Zhejiang Province (No. LY12E03001) and Department of Science and Technology of Zhejiang Province of China (2012C24003).

语种：英文

外文关键词：amphiphiles; NMR; differential scanning calorimetry (DSC); heat capacity; relaxation time; hydration

外文摘要：The relationships between the chemical structures and hydration environment of the polymers can provide significant insight into the water-amphiphilic polymer interactions. Here, the hydrophobicity of amphiphilic block copolymers poly(ethylene tartaramide-b-alkyl isocyanate) is gradually tuned by using of a series of pendant alkyl (isopropyl, n-butyl, cyclopentyl, and cyclohexyl) groups. Dynamics of hydration probed by low-field NMR relaxometry exhibits a heterogeneous environment of water molecules, corresponding to tightly bound water with slow re-orientational mobility and loosely bound water with fast re-orientational mobility. Progressively larger amounts of bound water are present in the copolymers, ongoing from pendant isopropyl, n-butyl, cyclopentyl, and finally to cyclohexyl group. Water in the copolymer bearing the cyclohexyl group has a significantly high partial specific heat capacity. Therefore, hydrophobic interaction between the polymer and water is enhanced when the hydrophobicity of the polymer is increased, resulting in considerable hydrophobic hydration with decreased mobility of the bound water. (C) 2016 Wiley Periodicals, Inc.