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使用双参数超弹性模型对水凝变形的描述.
Joseph M Scalet1, Faiz Mandani1, Stevin H Gehrke1
1Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66045, USA.
Gels (Basel, Switzerland)
|February 26, 2026
概括
这项研究比较了水凝变形的超弹性模型,发现奥格登和鲁宾斯坦-帕努科夫模型比标准的新胡克模型更好地捕捉材料行为,为凝网络结构提供了洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 类风病学 类风病学 类风病学
背景情况:
- 水凝广泛使用新胡克模型进行建模,该模型仅在有限的应变范围内准确.
- 了解在更广泛的范围内的水凝变形对于应用和阐明网络结构至关重要.
研究的目的:
- 评估超弹性模型 (Mooney-Rivlin,Ogden,Rubinstein-Panyukov,本地化) 作为对聚乙烯糖醇二烯酸盐 (PEGDA) 水凝的新胡克模型的替代方案.
- 评估各种前体分子重量和合成度的模型性能.
- 了解水凝网络结构,特别是纠的作用.
主要方法:
- 通过光聚合合成的PEGDA水凝具有不同的分子量 (700-4000 Da) 和度 (5-30 wt%).
- 对合成的水凝进行了单轴压缩测试.
- 将实验数据与四个超弹性模型相匹配,并使用Mooney图表 (减压与逆延伸比率) 评估匹配.
主要成果:
- 奥格登模型在最广泛的PEGDA配方中提供了最适合应力-应变曲线和Mooney图的模型.
- 定位和鲁宾斯坦-潘纽科夫模型准确地描述了低应变行为和压缩最大值,用于重叠度 (c*) 以上的度.
- 模型参数表明,纠会显著影响水凝的行为,随着网络度的增加,它们的贡献会减少.
结论:
- 奥格登,鲁宾斯坦-帕努科夫和局部化模型为描述水凝变形提供了优越的替代方案,而不是新胡克模型.
- 两参数模型显示了理解复杂的水凝变形行为和网络属性的巨大潜力.
- 在所有测试度中,纠效应是显著的,为PEGDA水凝的机械反应提供了关键的见解.
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