Temperature-dependent conformational change of PNIPAM grafted chains at high surface density in water

被引：133

作者：

Yim, H

Kent, MS ^{[1
]}

Mendez, S

Balamurugan, SS

Balamurugan, S

Lopez, GP

Satija, S

机构：

[1] Sandia Natl Labs, Dept 1851, Albuquerque, NM 87185 USA

[2] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA

[3] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

MACROMOLECULES | 2004年 / 37卷 / 05期

关键词：

D O I：

10.1021/ma0354290

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The use of neutron reflectivity to study the conformational change of poly(N-isopropylacrylamide) (PNIPAM) chains grafted at high surface density in water was investigated. It was observed that PNIPAM exhibits a lower critical solution temperature (LCST) of about 30° C in water that is attributed to alterations in the hydrogen bonding interactions of the amide group. As the temperature passed through the LCST, a strong contraction was observed. The results support the basis of a concentration dependent parameter for PNIPAM in water although polydispersity was not ruled out as a contributing factor.

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页码：1994 / 1997

页数：4

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