Issue 4, 2014

A phenomenological thermodynamic model for the chemo-responsive shape memory effect in polymers based on Flory–Huggins solution theory

Abstract

We present a phenomenological thermodynamic model to study the constitutive relations and working mechanism of the chemo-responsive shape memory effect (SME) in shape memory polymers (SMPs). On the origin of the Hildebrand solubility parameter, Flory–Huggins interaction parameter and relaxation theory, a phenomenological model is proposed to quantitatively identify the factors influencing the chemo-responsive SMPs. After this, a free-energy function is implemented to couple the constitutive relations of the chemical potential and stress as a function of the weight fraction of solvent and stretch, respectively. Furthermore, the simulation of the phenomenological thermodynamic model is compared with the available experimental results and the simulation results of a semi-empirical model reported in the literature for verification.

Graphical abstract: A phenomenological thermodynamic model for the chemo-responsive shape memory effect in polymers based on Flory–Huggins solution theory

Article information

Article type
Paper
Submitted
10 Sep 2013
Accepted
02 Oct 2013
First published
04 Oct 2013

Polym. Chem., 2014,5, 1155-1162

A phenomenological thermodynamic model for the chemo-responsive shape memory effect in polymers based on Flory–Huggins solution theory

H. Lu and S. Du, Polym. Chem., 2014, 5, 1155 DOI: 10.1039/C3PY01256E

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