A phenomenological thermodynamic model for the chemo-responsive shape memory effect in polymers based on Flory-Huggins solution theory
A phenomenological thermodynamic model for the chemo-responsive shape memory effect in polymers based on Flory-Huggins solution theory
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DOI：
10.1039/c3py01256e
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发表时间：
2014-02-21
影响因子：
4.6
通讯作者：
Du, Shanyi
中科院分区：
文献类型：
--
作者：
Lu, Haibao;Du, Shanyi
本文建立了一个现象热力学模型，研究了形状记忆聚合物（SMPs）中化学响应形状记忆效应（SME）的本构关系和工作机理。在Hildebrand溶解度参数、Flory-Huggins相互作用参数和弛豫理论的基础上，提出了一个现象模型来定量识别影响化学反应的SMPs的因素。在此之后，实现了自由能函数来耦合化学势和应力的本构关系，分别作为溶剂和拉伸的重量分数的函数。此外，将现象学热力学模型的模拟结果与已有的实验结果和文献中报道的半经验模型的模拟结果进行了比较，以进行验证。
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.