Issue 10, 2019, Issue in Progress
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RSC Advances

Quantitative determination of the spring entropy effect and its indication of the conformational change of polymer coils with varying concentration in aqueous poly(N-isopropylamide) solutions†

Li Song,a   Jiaxiang Lin,a   Panpan Liu,a   Jingqing Li, ORCID logo a   Shichun Jiang ORCID logo a  and  Dinghai Huang ORCID logo *a  

* Corresponding authors

a Department of Polymer Material Science and Engineering, Institution of Advanced Polymer Materials, School of Material Science and Engineering Tianjin University, Tianjin, China
E-mail: dhuang@tju.edu.cn

Abstract

The lower critical solution temperature (LCST) phase separation behaviors of thermosensitive poly(N-isopropylacrylamide) (PNIPAM) aqueous solutions were investigated by power-compensation differential scanning calorimetry (DSC). The entropic effect and hence the change of swelling state of PNIPAM polymer coils in homogeneous concentrated aqueous solutions with varied solution composition was elucidated by the isothermal enthalpy demixing recovery behaviors in distinct concentration regions.

Graphical abstract: Quantitative determination of the spring entropy effect and its indication of the conformational change of polymer coils with varying concentration in aqueous poly(N-isopropylamide) solutions

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Article information

DOI
https://doi.org/10.1039/C9RA00117D
Article type
Paper
Submitted
06 Jan 2019
Accepted
05 Feb 2019
First published
14 Feb 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 5540-5549

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Quantitative determination of the spring entropy effect and its indication of the conformational change of polymer coils with varying concentration in aqueous poly(N-isopropylamide) solutions

L. Song, J. Lin, P. Liu, J. Li, S. Jiang and D. Huang, RSC Adv., 2019, 9, 5540 DOI: 10.1039/C9RA00117D

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