Thermal transitions of poly(N-isopropylmethacrylamide) in aqueous solutions

被引：38

作者：

Sánchez, MS

Hanyková, L

Ilavsky, M

Pradas, MM

机构：

[1] Univ Politecn Valencia, Ctr Biomat, E-46071 Valencia, Spain

[2] Charles Univ, Fac Math & Phys, CR-18000 Prague 8, Czech Republic

[3] Acad Sci Czech Republ, Inst Macromol Chem, CR-16206 Prague 6, Czech Republic

来源：

POLYMER | 2004年 / 45卷 / 12期

关键词：

temperature induced transition; PIPMAm; DSC;

D O I：

10.1016/j.polymer.2004.04.020

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Thermal transitions of poly(N-isopropylmethacrylamide) (PIPMAm) in aqueous solutions were studied in a wide temperature range from - 100 to 60degreesC. The solutions of different polymer weight fractions (c = 0.03-1) were investigated in cooling and heating scans of differential scanning calorimetry; four qualitatively different kinds of thermograms were identified in dependence of the fraction, c. The transitions are explained in a thermodynamic framework based on the phase diagram of the system. This diagram provides a complete understanding of thermal transitions in aqueous PIPMAm solutions as a function of c, in particular the existence of non-crystallizable water and the temperature induced phase transition that is due to the hydrophobic interaction in PIPMAm solutions. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：4087 / 4094

页数：8

共 38 条

[1] SYNTHETIC HYDROGELS .3. HYDROXYALKYL ACRYLATE AND METHACRYLATE COPOLYMERS - SURFACE AND MECHANICAL-PROPERTIES [J].