Molecular analysis of interpolymer complexation in graft copolymer networks

被引：69

作者：

Lowman, AM ^{[1
]}

Peppas, NA ^{[1
]}

机构：

[1] Purdue Univ, Sch Chem Engn, Polymer Sci & Engn Labs, W Lafayette, IN 47907 USA

来源：

POLYMER | 2000年 / 41卷 / 01期

基金：

美国国家卫生研究院;

关键词：

complexation; poly(ethylene glycol); graft copolymers;

D O I：

10.1016/S0032-3861(99)00159-7

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Interpolymer complexation is associated with the formation of hydrogen bonds between pendent and/or grafted groups of a single polymer or copolymers. The degree of complexation can be described theoretically in terms of complexation/decomplexation equilibrium characteristics. Graft copolymer networks of poly(methacrylic acid-g-ethylene glycol) were prepared by free radical solution polymerization of methacrylic acid and poly(ethylene glycol) monomethacrylate. The ensuing gels exhibited drastic network structural changes in response to environmental pH changes due to the formation/dissociation of interpolymer complexes. The molecular level degree of complexation was determined as a function of copolymer composition, PEG graft chain molecular weight and environmental pH. The largest degrees of complexation were observed in gels containing nearly equimolar amounts of the monomeric units and the longest molecular weight poly(ethylene glycol) grafts. These trends were predicted by the equilibrium complexation theory and were in good agreement with the experimental data. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：73 / 80

页数：8

共 49 条

[21] SELF-ASSOCIATING NETWORKS OF POLY(METHACRYLIC ACID-G-ETHYLENE GLYCOL) [J].

KLIER, J ;

SCRANTON, AB ;

PEPPAS, NA .

MACROMOLECULES, 1990, 23 (23) :4944-4949

[22]

Klier J., 1990, ABSORBENT POLYM TECH, P147

[23] Complexation of poly(ethylene oxide) with poly(acrylic acid-co-hydroxyethyl methacrylate)s [J].

Krupers, MJ ;

VanderGaag, FJ ;

Feijen, J .

EUROPEAN POLYMER JOURNAL, 1996, 32 (06) :785-790

[24]

Lee YM, 1996, J APPL POLYM SCI, V62, P301, DOI 10.1002/(SICI)1097-4628(19961010)62:2<301::AID-APP5>3.3.CO

[25]

2-L

[26] Analysis of the complexation/decomplexation phenomena in graft copolymer networks [J].

Lowman, AM ;

Peppas, NA .

MACROMOLECULES, 1997, 30 (17) :4959-4965

[27]

LOWMAN AM, 1999, IN PRESS INTELLIGENT

[28]

LOWMAN AM, 1999, IN PRESS MAT CONTROL

[29]

Moharram MA, 1996, J APPL POLYM SCI, V59, P987

[30] COMPLEX-FORMING POLY(OXYETHYLENE) POLY(ACRYLIC ACID) INTERPENETRATING POLYMER NETWORKS .2. FUNCTION AS A CHEMICAL VALVE [J].

NISHI, S ;

KOTAKA, T .

MACROMOLECULES, 1986, 19 (04) :978-984

← 1 2 3 4 5 →