金属-聚合物注射成形界面微结构强化机理及力学性能研究

项目名称： 金属-聚合物注射成形界面微结构强化机理及力学性能研究

项目编号： No.51305405

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 李熹平

作者单位： 浙江师范大学

项目金额： 25万元

中文摘要： 金属-聚合物复合高强件具有强度高、质量小、易成形复杂结构等优点，在航空航天、汽车制造、通讯等领域日益得到重视。围绕金属-聚合物复合件的成形理论与技术，本项目提出通过改善金属表面的温度、微观结构和聚合物成形时的黏度、压力等因素，利用注射工艺直接成形金属-聚合物复合高强件的方法。研究金属表面微纳结构的形成方法及不同微结构对金属-聚合物界面结合力学性能的对应关系；探讨微尺度下聚合物熔体的黏度效应、表面张力效应和壁面滑移等因素对高分子链段浸入金属表面微纳结构的能力和界面结合力学性能的影响规律；分析熔体在金属-聚合物界面的固化机理和结晶类型，揭示金属-聚合物界面微结构强化机理。研究注射条件与熔体流动、润湿/浸入、固化/结晶等行为的对应关系，建立工艺参数对金属-聚合物界面的拉伸强度、疲劳强度等力学性能的影响关系曲线。项目的研究结果可为金属-聚合物复合高强件的注射成形提供理论指导和基础工艺数据支撑。

中文关键词： 注射成形；金属-聚合物；微结构；；

英文摘要： As having the characteristics of high strength, small quality and easy forming complex structures, metal-polymer composite parts are receiving increasing attention in the field of aerospace, automotive manufacturing and communications. Based on the forming technology for the metal-polymer composite parts, a new method to manufacture these products is proposed in this project. By improving the temperature, microscopic structure of the metal surface, and the viscosity, pressure and other characteristics of the polymer melt, the metal-polymer composite parts can be directly manunfactured by injection method. Accordingly, in this project, the characteristics that the polymer melt flows on the metal alloy surface and the mechanism of the melt bonding with the metal alloy are studied. Firstly, the theory of micro-structure formed on the metal surface is studied and the influences of different types of structures on the interface performance are compared; Then, the influences of the microscale effect of the polymer melt such as the viscosity effect, surface tension effect and wall slip effect on the ability of the polymer chain infiltrated in the micro-structure are studied. Thirdly, the solidification process of the polymer melt on the interface is analyzed and the models for the melt solidifying and crystallizing pro

英文关键词： Injection molding；metal-polymer composites；microstructure；；