Correlation Analysis of Epoxy/Amine Resin Cure, Structure and Chemorheological Behavior in RTM Processes
Correlation Analysis of Epoxy/Amine Resin Cure, Structure and Chemorheological Behavior in RTM Processes
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RTM 工艺中环氧/胺树脂固化、结构和化学流变行为的相关分析
DOI：
10.1002/pc.21060
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发表时间：
2011-04-01
影响因子：
5.2
通讯作者：
Shi, Tongfei
中科院分区：
文献类型：
--
作者：
Ding, Yanyu;Jia, Yuxi;Shi, Tongfei
在树脂传递模塑（RTM）工艺的反应充模阶段，环氧/胺树脂固化、结构和化学流变行为的相关性分析对RTM工艺的优化控制起着关键作用。提出了一种新的考虑边缘效应的RTM工艺反应性树脂流动模拟方法。递归方法和支化理论分别用于描述分子结构和树脂粘度的演变。采用半隐式迭代计算方法和有限体积法对树脂流动过程进行了数值模拟。结果表明，所提出的树脂固化-结构-粘度模型与RTM充模过程中的粘度实验数据吻合良好。固化反应导致树脂转化率和树脂分子量在模腔中分布不均匀，从而导致制品在空间上的结构和性能不均匀。随着注射温度的升高或模腔边缘宽度的增大，树脂转化率和模腔中树脂分子量的差异更加明显。该研究有助于理解工艺参数与树脂结构和性能之间的复杂关系。Polym.比较器：32：648-656，2011年。(C)2011年塑料工程师学会
At the reactive mould-filling stage in resin transfer moulding (RTM) processes, the correlation analysis of epoxy/amine resin cure, structure and chemorheological behavior plays a key role in the optimum control of RTM processes. A new methodology used to simulate the reactive resin flow in RTM processes with edge effect is presented in this article. The recursive approach and the branching theory are used to describe the evolution of molecular structure and resin viscosity, respectively. And then the resin flow process is simulated by means of a semi-implicit iterative calculation method and the finite volume method. The results reveal the proposed resin cure-structure-viscosity model provides excellent agreement with the experimental viscosity data during the RTM filling process. It is also observed that the curing reaction causes the inhomogeneous distribution of resin conversion and resin molecular weight in the mould cavity, which will result in the spatially structural and performance inhomogeneities in the finished products. With the injection temperature or the edge width increasing, the discrepancy of resin conversion and resin molecular weight in the mould cavity is more evident. This study is helpful for understanding the complicated relationship among the processing variables, resin structures, and properties. POLYM. COMPOS., 32: 648-656, 2011. (C) 2011 Society of Plastics Engineers