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聚酰胺6.6的湿力学行为：实验与建模

Hygromechanical Behavior of Polyamide 6.6: Experiments and Modeling.

作者信息

Wetzel Paul, Sambale Anna Katharina, Uhlig Kai, Stommel Markus, Schneider Benjamin, Kaiser Jan-Martin

机构信息

Component Design, Reliability and Validation Polymers, Corporate Sector Research and Advance Engineering, Robert Bosch GmbH, Robert-Bosch-Campus 1, 71272 Renningen, Germany.

Institute of Polymer Materials, Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.

出版信息

Polymers (Basel). 2023 Aug 12;15(16):3387. doi: 10.3390/polym15163387.

DOI:10.3390/polym15163387
PMID:37631444
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10459301/
Abstract

This paper investigates water absorption in polyamide 6.6 and the resulting hygroscopic swelling and changes in mechanical properties. First, sorption and swelling experiments on specimens from injection molded plates are presented. The observed swelling behavior is dependent on the melt flow direction of the injection molding process. Additionally, thermal analysis and mechanical tensile tests were performed for different conditioning states. The water sorption is accompanied by a decrease in the glass transition temperature and a significant reduction in stiffness and strength. Next, a sequentially coupled modeling approach is presented. A nonlinear diffusion model is followed by mechanical simulations accounting for swelling and concentration-dependent properties. For the mechanical properties, the notion of a "gap" temperature caused by the shift of the glass transition range due to water-induced plasticization is employed. This model enables the computation of local moisture concentration fields and the resultant swelling and changes in stress-strain behavior.

摘要

本文研究了聚酰胺6.6的吸水性以及由此产生的吸湿膨胀和力学性能变化。首先，介绍了对注塑板材试样进行的吸附和膨胀实验。观察到的膨胀行为取决于注塑工艺的熔体流动方向。此外，还针对不同的调节状态进行了热分析和机械拉伸试验。吸水伴随着玻璃化转变温度的降低以及刚度和强度的显著降低。接下来，提出了一种顺序耦合建模方法。首先是一个非线性扩散模型，然后是考虑膨胀和浓度依赖特性的力学模拟。对于力学性能，采用了由于水诱导增塑导致玻璃化转变范围移动而产生的“间隙”温度概念。该模型能够计算局部水分浓度场以及由此产生的膨胀和应力-应变行为变化。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/334ed1daf355/polymers-15-03387-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/50a806e96ce2/polymers-15-03387-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/7904a505b22c/polymers-15-03387-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/f9588a973900/polymers-15-03387-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/f951c5fde67a/polymers-15-03387-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/d60fe6974701/polymers-15-03387-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/c8f39024b53f/polymers-15-03387-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/334ed1daf355/polymers-15-03387-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/9deef738b138/polymers-15-03387-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/311369153578/polymers-15-03387-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/e2af4aa6f745/polymers-15-03387-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/4d70a0cd5b44/polymers-15-03387-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/95fa5ce4c9f8/polymers-15-03387-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/2d8241ccbcd9/polymers-15-03387-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/50a806e96ce2/polymers-15-03387-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/7904a505b22c/polymers-15-03387-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/f9588a973900/polymers-15-03387-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/f951c5fde67a/polymers-15-03387-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/d60fe6974701/polymers-15-03387-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/c8f39024b53f/polymers-15-03387-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e18/10459301/334ed1daf355/polymers-15-03387-g013.jpg

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本文引用的文献

1
Characterisation and Modelling of Moisture Gradients in Polyamide 6.聚酰胺6中水分梯度的表征与建模
Polymers (Basel). 2021 Sep 17;13(18):3141. doi: 10.3390/polym13183141.
2
Characterisation and FE Modelling of the Sorption and Swelling Behaviour of Polyamide 6 in Water.聚酰胺6在水中的吸附与溶胀行为表征及有限元建模
Polymers (Basel). 2021 May 4;13(9):1480. doi: 10.3390/polym13091480.
3
Process Induced Skin-Core Morphology in Injection Molded Polyamide 66.注塑成型聚酰胺66中工艺诱导的皮芯形态
Polymers (Basel). 2020 Apr 12;12(4):894. doi: 10.3390/polym12040894.