《複合材料學報》優先在線發表論文。
摘 要:採用流變儀測試耐高溫縮水甘油胺型環氧樹脂體系的黏度-溫度和黏度-時間特性曲線,考察樹脂體系的化學流變特性,建立和對比樹脂體系在等溫條件下黏度特性曲線的Daul Arrhenius模型和工程黏度模型,提出了一種二階指數黏度模型預測體系的黏度變化規律。結果表明,二階指數模型的預測精度和適用範圍均優於Daul Arrhenius模型和工程黏度模型,預測黏度與實驗值具有良好的一致性,根據建立的黏度隨溫度、時間變化的唯象關係式,可方便準確地預報樹脂體系的工藝窗口,指出其在工程應用中必須改善的工藝問題。
關鍵詞:耐高溫;環氧樹脂;化學流變模型;黏度;工藝窗口
Abstract: The viscosity-temperature and viscosity-time curves of high-temperature resistant glyceramine epoxy resin system were measured by the rotational rheometer to investigate the chemorheological characteristics of the resin system. Daul Arrhenius model and Engineering viscosity model were established compared with each other to analyze the isothermal viscosity characteristics of the resin system. Then a second-order exponential viscosity model was proposed to predict the viscosity of the resin system under the isothermal condition. The results show that the accuracy and applicability of the second-order exponential model for viscosity predicting is better than Daul Arrhenius model and Engineering viscosity model. The predicted results of the second-order exponential model are in a good agreement with the experimental data. This phenomenological formula of viscosity versus temperature and time can be used to predict the processing window of the resin system and point out the technology problems in the engineering applications.
Key word: High-temperature resistant; Epoxy ; Chemorheological model; Viscosity; Processing window
通訊作者:吳海,國防科學技術大學,航天科學與工程學院,湖南長沙
全文詳見中國知網學術期刊優先數字出版。