原位研究高分子材料结构与力学性能的同步辐射红外和X射线衍射显微技术

项目名称： 原位研究高分子材料结构与力学性能的同步辐射红外和X射线衍射显微技术

项目编号： No.U1232128

项目类型： 联合基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 戚泽明

作者单位： 中国科学技术大学

项目金额： 60万元

中文摘要： 高分子材料由于其比强度高、易加工等优点，逐渐取代传统材料在大飞机等高技术领域的应用。但高分子材料结构的多尺度、非均匀、非平衡等复杂特点是认识结构与力学性能关系的主要难题，阻碍了其性能提升和应用拓展。针对这一挑战，本项目计划研制与同步辐射红外显微谱学和X射线微焦点衍射等实验站联用的超微型力学测试装置，以天然橡胶和聚醚醚酮碳纤维复合材料为研究案例，发展原位实时微区分析技术，在力学性能测试的同时实现时间和空间分辨的多尺度结构测试，从实验上直接将不同微区的结构及演化规律与力学性能关联。两种检测技术都具有微米空间分辨、几乎涵盖了高分子材料的主要结构尺度，其中红外显微谱学检测微区链构象、晶体和无定形的取向，微焦点X 射线衍射获取晶体结构、尺寸、取向等信息。通过本项目，力求建立研究高分子材料介观力学的同步辐射方法，更好的为高分子材料及其它材料研究领域的用户服务。

中文关键词： 同步辐射红外显微；同步辐射X射线衍射；高分子结构；力学性能；原位

英文摘要： Polymer is gradually replacing the traditional materials in high technology field such as big aircraft manufacture, because of its high specific strength and easy process. However, multi-scale, inhomogeneous, nonequilibrium and complex polymer structure makes it very difficult to understand the relationship between structure and mechanical properties, and blocks the improving of performance and expanding of application. Aim at the challenge, this project plans to develop micro- mechanical measurement set-up which can be used in in-situ measurement with both synchrotron infrared microspectroscopy and micro-X ray diffraction. Taking natural rubber and carbon fiber/polyetheretherketone (CF/PEEK) composites for example, by developing in-situ micro-probe technique, we will accomplish multi-scale structure characterization with time and space resolution accompanying with mechanical properties measurement. It will directly relate the structure and its evolvement in a micro-area to mechanical properties. Both Synchrotron infrared microspectroscopy and micro-X ray diffraction have micrometer spatial resolution covering almost whole structure scale in polymer. Infrared microspectroscopy can study the spatial content distribution of molecular conformation, crystalline and amorphous, while micro-X ray diffraction can obtain

英文关键词： synchrotron infrared microspectroscopy；;Synchrotron Xray diffraction；polymer；mechanical property；in-situ