Paper Title:
Stress Analysis of the Swelling and Deswelling Process of Thermo-Responsive Gel
  Abstract

Poly-N-isopropylacrylamide (PNIPA) gel is a typical thermo responsive gel which undergoes a large volume change from the low-temperature swollen phase to the high-temperature shrunken phase. In this study, the mechanical behavior of PNIPA gels was investigated by the experiment and simulation. The cylindrical shaped specimens of PNIPA gel were prepared and tensioned at various temperature. Swelling ratio at equilibrium state was calculated by diameter of swelling gels. Young modulus was obtained from stress-strain curve plotted using tensile load measured by semiconductor gauge. Also swelling and deswelling behavior of thermo sensitive gel were simulated by using finite element method. Polymer-solvent interaction parameter, χ was used as a function of temperature. Calculated swelling ratio at equilibrium was compared with experimental result and theoretical swelling curve. Furthermore, change of volume fraction and stress distribution in swelling process were evaluated.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
2215-2218
DOI
10.4028/www.scientific.net/KEM.353-358.2215
Citation
K. Kuhara, M. Enoki, "Stress Analysis of the Swelling and Deswelling Process of Thermo-Responsive Gel ", Key Engineering Materials, Vols. 353-358, pp. 2215-2218, 2007
Online since
September 2007
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$32.00
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