中国胶粘剂

将硅烷偶联剂改性的钨粉加入到环氧树脂和固化剂中,制备了钨/环氧树脂辐射防护复合材料。通过扫描电镜、原位拉伸装置研究了钨含量80%(相对于整体质量而言)的钨/树脂基辐射防护复合材料的拉伸性能和微观组织演变。研究结果表明:钨含量80%的钨/环氧树脂辐射防护复合材料试样在拉伸过程中裂纹起始于材料中的钨粉团聚颗粒和气孔处,大量裂纹产生释放应力,较大的裂纹合并后试样发生断裂。硅烷偶联剂改性可以改善钨/环氧树脂复合材料的界面结合力,提升力学性能。改性后钨含量80%的钨/环氧树脂辐射防护复合材料的抗拉强度为8.49 MPa,最大应变为5.5%,大于纯钨的延伸率(3%),有利于加工成防辐射纤维材料。

Tungsten powder modified by silane coupling agent was added into epoxy resin and curing agent,and tungsten/epoxy resin composite material for radiation protection was then prepared. The tensile properties and microstructure evolution of tungsten/resin-based composite material for radiation protection with 80% tungsten content(relative to the total mass)were studied by scanning electron microscope and in-situ tensile device. The research results showed that during the tensile process,the cracks of tungsten/epoxy resin composite material sample for radiation protection with 80% tungsten content started at the agglomerated particles and pores of tungsten powder in the material,and a large number of cracks produced release stress,the larger cracks merged and the sample broke. Modification with silane coupling agent could improve the interface adhesion of tungsten/epoxy resin composite material and enhance mechanical properties. The tensile strength of tungsten/epoxy resin composite material for radiation protection with 80% tungsten content after modification was 8.49 MPa,the maximum strain was 5.5%,which was higher than the elongation of pure tungsten(3%),and was conducive to processing into radiation-proof fiber material.