AFM纳米力学图谱技术研究反应增容共混物界面的微观结构与纳米力学性能

聚合物共混物界面处的微观结构与力学性能是决定其最终使用性能的关键因素，而如何表征界面处的微观结构与力学性能，尤其是表征界面处的力学性能，并建立二者之间的定量关系一直是该领域的研究难点。本项目利用原子力显微镜纳米力学图谱技术能同时表征材料微观结构与力学性能这一优势，通过调控反应增容共混物组份配比、加工条件及相间的界面粘结，对其界面微观结构、界面层厚度、界面处纳米力学性能；界面的形成、演化及二者反应在材料界面处纳米力学性能的变化进行系统性研究，从而建立和进一步深入理解界面结构与材料微观、宏观力学性能之间的量化关系，提出增韧增强机理的新见解，为反应增容共混物的界面调控和高性能化提供理论基础和技术支持。

The interfacial structure and mechanical property of polymer blends play a central role for improving its ultimate mechanical properties, while the available techniques to characterize and study the interfacial structure and mechanical property, especially the mechanical property at an interface, are still very limited, and to establish quantitatively the relationships between the interfacial structure and mechanical property is still a challenge. In the present project, we use AFM nanomechanical mapping that can simultaneously provides information related to the microstructure and mechanical properties of a materials to investigate the interfacial morphology, thickness, nanoscale mechanical property by controlling the composition, processing conditions, and interfacial adhesion; and to investigate the interfacial formation, development, and the effects of the above factors on the interfacial mechanical property. This work will establish quantitatively the relationships between the interfacial structure and mechanical property, and provides new insights into the fundamental understanding of the structure and mechanical property relationships and reinforcement mechanisms of polymer blends.