摘要
把关联模型(association models)推广应用到聚异丙基丙烯酰胺(PNIPAM)高分子凝胶体系,研究PNIPAM-水的氢键和水-水的氢键在高分子凝胶体积相变中的作用.首先通过分析凝胶体积分数与温度的关系发现,由于两种氢键作用,随着温度变化PNIPAM凝胶出现体积相变,表明在体积相变过程中两种氢键都起着重要作用.其次,对旋节线的研究发现,PNIPAM凝胶体积相变中出现的下临界共溶温度(LCST)现象也是由于PNIPAM-水氢键和水-水氢键共同作用的结果.
We presented a theory to study the volume phase a transition in Poly（N-isopropylacrylamide）（PNIPAM） gels. Our theory model includes the consideration of PNIPAM-water and water-water hydrogen bonds. On basis of our theory approach, we investigated the PNIPAM gels volume fraction as a function of temperature. It is clearly indicate, because of two types of hydrogen bonds, PNIPAM gels present volume phase transitions. The calculated spinodal curves reveal, also because of both PNIPAM-water and water-water hydrogen bonds, the presence of lower critical solution temperature（LCST）.
出处
《伊犁师范学院学报（自然科学版）》
2014年第3期30-34,共5页
Journal of Yili Normal University：Natural Science Edition
基金
伊犁师范学院一般项目(2013YSYB17)
关键词
PNIPAM凝胶
体积相变
氢键
Poly（N-isopropylacrylamide） gels
volume phase transition
Hydrogen bonds
