Thermosensitive Phase Separation Behavior of Poly(benzyl methacrylate)/Solvate Ionic Liquid Solutions

被引：22

作者：

Kobayashi, Yumi ^{[1
]}

Kitazawa, Yuzo ^{[1
]}

Hashimoto, Kei ^{[1
]}

Ueki, Takeshi ^{[2
]}

Kokubo, Hisashi ^{[1
]}

Watanabe, Masayoshi ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Chem & Biotechnol, Hodogaya Ku, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan

[2] Natl Inst Mat Sci, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

来源：

LANGMUIR | 2017年 / 33卷 / 49期

基金：

日本学术振兴会;

关键词：

SOLUTION TEMPERATURE BEHAVIOR; POLYMER ELECTROLYTES; PHYSICOCHEMICAL PROPERTIES; THERMORESPONSIVE POLYMER; POLY(ETHYLENE OXIDE); LINEAR-POLYMERS; LI-ION; SOLVENTS; TRANSPORT; MIXTURES;

D O I：

10.1021/acs.langmuir.7b03378

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a lower critical solution temperature (LOST) behavior of binary systems consisting of poly(benzyl methacrylate) (PBnMA) and solvate ionic liquids: equimolar mixtures of triglyme (G3) or tetraglyme (G4) and lithium bis(trifluoromethanesulfonyDamide. We evaluated the critical temperatures (T(c)s) using transmittance measurements. The stability of the glyme-Li+ complex ([Li(G3 or G4)](+)) in the presence of PBnMA was confirmed using Raman spectroscopy, pulsed-field gradient spin echo NMR. (PGSE-NMR), and thermogravimetric analysis to demonstrate that the complex was not disrupted. The interaction between glyme-Li+ complex and PBnMA was investigated via Li-7 NMR chemical shifts. Upfield shifts originating from the ring-current effect of the aromatic ring within PBnMA were observed with the addition of PBnMA, indicating localization of the glyme-Li+ complex above and below the benzyl group of PBnMA, which may be a reason for negative mixing entropy, a key requirement of the LCST.

引用

页码：14105 / 14114

页数：10

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