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基于分数流变模型的PA6薄膜动态粘弹性非对称响应研究

Investigation of Dynamic Viscoelastic Asymmetric Response of PA6 Film Based on Fractional Rheological Model.

作者信息

Li Bowen, Liao Guangkai, Li Yuankang, Xie Zhenyan, Cui Lingna, Cao Kaikai, Liu Yuejun

机构信息

Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, Hunan University of Technology, Zhuzhou 412007, China.

Zhuzhou Times Engineering Plastics Industrial Co., Ltd., Zhuzhou 412008, China.

出版信息

Polymers (Basel). 2024 Aug 30;16(17):2485. doi: 10.3390/polym16172485.

DOI:10.3390/polym16172485
PMID:39274118
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11397991/
Abstract

Polyamide 6 (PA6) film as a typical viscoelastic material, satisfies the time-temperature superposition (TTS), and demonstrates obvious dynamic strain amplitude and frequency correlation under dynamic load. The investigation of the dynamic mechanical behavior of PA6 film is essential to ensure the safety of these materials in practical applications. In addition, dynamic mechanical property testing under conventional experimental conditions generally focuses on the short-term mechanical performance of materials. Therefore, the dynamic viscoelasticity of PA6 film was tested using a dynamic thermo-mechanical analyzer (DMA) in this study, and the complex modulus master curve was constructed based on time-temperature superposition (TTS) to realize the accelerated characterization of long-term mechanical properties. Furthermore, according to experimentally obtained asymmetric characteristics of the Cole-Cole diagram and the loss modulus master curve of the PA6 film, the parameter distribution of the fractional Zener model and the modified fractional Zener model were compared, and the asymmetric dynamic viscoelastic response of PA6 film under different conditions was systematically investigated using these models. The results indicate that the modified fractional Zener model can truly describe the dynamic asymmetric characteristics of PA6 film, verify the feasibility and advantages of the modified fractional rheological model, and provide some theoretical guidance for exploring the tensile rheological mechanism of PA6 film.

摘要

聚酰胺6（PA6）薄膜作为一种典型的粘弹性材料，满足时温等效原理，并在动态载荷下表现出明显的动态应变幅值和频率相关性。研究PA6薄膜的动态力学行为对于确保这些材料在实际应用中的安全性至关重要。此外，传统实验条件下的动态力学性能测试通常侧重于材料的短期力学性能。因此，本研究使用动态热机械分析仪（DMA）测试了PA6薄膜的动态粘弹性，并基于时温等效原理构建了复模量主曲线，以实现长期力学性能的加速表征。此外，根据实验获得的PA6薄膜的Cole-Cole图和损耗模量主曲线的不对称特性，比较了分数阶齐纳模型和修正分数阶齐纳模型的参数分布，并使用这些模型系统地研究了PA6薄膜在不同条件下的不对称动态粘弹性响应。结果表明，修正分数阶齐纳模型能够真实地描述PA6薄膜的动态不对称特性，验证了修正分数阶流变模型的可行性和优势，并为探索PA6薄膜的拉伸流变机理提供了一些理论指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f4d/11397991/c64a2aa52f3e/polymers-16-02485-g017.jpg
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本文引用的文献

1
Investigation on the Correlation between Biaxial Stretching Process and Macroscopic Properties of BOPA6 Film.双向拉伸工艺与BOPA6薄膜宏观性能的相关性研究
Polymers (Basel). 2024 Apr 1;16(7):961. doi: 10.3390/polym16070961.