Structure and dynamics of poly(vinyl alcohol) gels in mixtures of dimethyl sulfoxide and water

被引：38

作者：

Kanaya, Toshiji ^{[1
]}

Takahashi, Nobuaki ^{[2
]}

Takeshita, Hiroki ^{[3
]}

Ohkura, Masatoshi ^{[4
]}

Nishida, Koji ^{[1
]}

Kaji, Keisuke ^{[1
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[2] Japan Atom Energy Agcy, Neutron Sci Sect, Mat & Life Sci Div, J PARC Ctr, Tokai, Ibaraki, Japan

[3] Nagaoka Univ Technol, Dept Mat Sci & Technol, Nagaoka, Niigata 94021, Japan

[4] Toray Industries Ltd, Films &Film Prod Res Labs, Otsu, Shiga, Japan

来源：

POLYMER JOURNAL | 2012年 / 44卷 / 01期

关键词：

dynamics; gel; light scattering; neutron spin echo; phase separation; poly(vinyl alcohol); small-angle neutron scattering; SMALL-ANGLE NEUTRON; LIGHT-SCATTERING; PHASE-SEPARATION; SPINODAL DECOMPOSITION; GELATION PROCESS; MIXED-SOLVENTS; VISCOELASTICITY; TRANSPARENT; MOLECULES; HYDROGELS;

D O I：

10.1038/pj.2011.88

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We reviewed our structure studies on poly(vinyl alcohol) (PVA) gels formed in the mixtures of dimethyl sulfoxide (DMSO) and water using various scattering methods, including wide-, small-and ultra-small-angle neutron scattering and light scattering. These studies revealed the hierarchic structure of PVA gels formed in DMSO/water (60/40 v/v) in a very wide spatial scale from 1 A to several micrometers. The crosslinking points are crystallites with radii of similar to 70 angstrom, the distance between the neighboring crystallites is 180-200 angstrom, and the bicontinuous structure due to liquid-liquid phase separation is in mu m scale. We also review our dynamic studies on three kinds of PVA gels at the nanometer scale using neutron spin echo techniques to separate the concentration fluctuations observed by small-angle neutron scattering into the static and dynamics contributions. Polymer Journal (2012) 44, 83-94; doi:10.1038/pj.2011.88; published online 19 October 2011

引用

页码：83 / 94

页数：12

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