多尺度纳米颗粒协同增韧热固性聚合物体系的构筑及其断裂机理研究

项目名称： 多尺度纳米颗粒协同增韧热固性聚合物体系的构筑及其断裂机理研究

项目编号： No.51203038

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 有机高分子材料学科

项目作者： 汤龙程

作者单位： 杭州师范大学

项目金额： 25万元

中文摘要： 抵抗裂纹扩展能力差是热固性聚合物的一个固有缺点，严重影响了它们更广泛的工程应用。纳米颗粒的复配是显著改善这类材料断裂韧性的有效途径。然而，纳米颗粒的团聚和协同增韧机理的不明确等因素制约了材料性能的进一步调控和优化。本项目我们尝试利用良好分散的多尺度纳米颗粒来改性热固性聚合物，探索构建具有协同增韧效应的多层次微纳结构，以实现大幅提高材料的断裂韧性而不降低其它重要性能，并进行相关断裂机理的研究。具体内容包括：优化和发展良好分散的不同纳米颗粒复配改性热固性聚合物复合材料的制备工艺，探索纳米颗粒之间复杂的相互作用，构筑多尺度纳米颗粒协同增韧热固性聚合物复合材料体系，尝试建立纳米复合材料组成-微结构-形态-宏观力学性能之间的构效关系，重点关注多尺度纳米颗粒改性热固性聚合物的协同增韧效应及其相关断裂行为的研究，为研制力学性能优异聚合物基纳米复合材料奠定理论和技术基础。

中文关键词： 热固性聚合物；纳米复合材料；多尺度颗粒；协同增韧；断裂机理

英文摘要： Poor crack resistance is the inherent nature of thermosetting polymers, which greatly limit their wide applications in engineering field. The combination of nanoparticles is an effective method to improve significantly the fracture toughness of such materials. However, some factors, such as the agglomeration of nanoparticles and the uncertain and vague mechanisms of synergistic toughening effect, restrict to further tailor and optimize their performance. In this project, we try to modify the thermosetting polymer with well-dispersed multi-scale nanoparticles, explore to build the multi-level micro-/nano- structures with having the synergistic toughening effect, achieve the greatly significant improvement in the fracture toughness of thermosetting polymer without reduction in other important properties, and further investigate the relative fracture mechanisms. Specific content includes: optimize and develop the fabrication process of the thermosetting polymer composites modified with the combination of different nanoparticles, explore the complicated interaction between the multi-scale nanoparticles, construct the thermosetting polymer composite systems toughened synergistically by multi-scale nanoparticles, try to establish the relationships among composition - microstructure - morphology - macro-mechanical pro

英文关键词： Thermosetting polymer；Nanocomposite；Multi-scale particle；Synergistic toughening；Fracture mechanism