Prediction of Aging Performance of Particle-Filled Polymer Composites Based on RVE Model.
Prediction of Aging Performance of Particle-Filled Polymer Composites Based on RVE Model.
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DOI：
10.3390/polym15244724
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发表时间：
2023-12-16
期刊：
影响因子：
5
通讯作者：
Du J
中科院分区：
文献类型：
--
作者：
Wang H;Fang C;Zhang Y;Zhang M;Shen T;Du J
在这项研究中，粒子填充的聚合物复合材料（PFPC）在热氧化条件下的老化性能进行了研究多尺度。通过高温加速老化试验，分析了老化时间和温度的影响。采用随机粒子填充算法建立了PFPC的代表性体积元模型。基于聚合物氧化闭环链式反应，建立了交联密度预测模型。根据高分子物理理论，确定了交联密度与基体模量的关系。RVE模型中的颗粒/基体界面用内聚区模型（CZM）表示。通过反演技术确定了CZM的参数。然后，建立了一个综合的多尺度RVE模型，并将其应用于预测老化PFPC的模量和去湿应变。预测结果与试验结果吻合较好，验证了模型的可靠性。
In this study, the aging performance of particle-filled polymer composites (PFPCs) under thermo-oxidative conditions was investigated on multiple scales. High-temperature-accelerated tests were conducted to analyze the effects of aging time and temperature. A representative volume element (RVE) model was established for the PFPCs using a random particle-filling algorithm. A predictive model for the crosslink density was conducted based on the closed-loop chain reaction of polymer oxidation. According to the theory of polymer physics, the relation between the crosslink density and matrix modulus was determined. The particle/matrix interface in the RVE model was represented by the cohesive zone model (CZM). The parameters of the CZM were determined by the inversion techniques. Then, a comprehensive multiscale RVE model was constructed, which was applied to predict the modulus and dewetting strain of the aged PFPCs. The predicted results show good agreement with the test results, which verifies the reliability of our model.
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通讯作者：
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