Effect of incorporating a trace amount of fluorocarbon into poly(N-isopropylacrylamide) on its association in water

被引：37

作者：

Zhang, YB

Li, M

Fang, Q

Zhang, YX

Jiang, M

Wu, C ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong

[2] Fudan Univ, Inst Macromol Sci, Shanghai 200433, Peoples R China

[3] Univ Sci & Technol China, Dept Phys Chem, Hefei 230026, Anhui, Peoples R China

来源：

MACROMOLECULES | 1998年 / 31卷 / 08期

关键词：

D O I：

10.1021/ma9714171

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A combination of laser light scattering (LLS), viscometry, and fluorescence spectroscopy was used to study the association of a series of fluorocarbon-modified poly(N-isopropylacrylamide) (PNIPAM) copolymers in aqueous solution. The interchain association increases as both the fluorocarbon content and polymer concentration increase, evidenced by the changes of the apparent molar mass, intrinsic viscosity, Huggins constant, and fluorescence excimer-to-monomer intensity ratio. The LLS results are well-represented by the open association model. Our results also revealed that the intrachain association starts when each polymer chain, on average, has more than two fluorocarbon monomers.

引用

页码：2527 / 2532

页数：6