研究了与5284树脂体系相匹配的2种定位胶黏剂LSG-1和LSG-2,以应用于复合材料RTM制备工艺.分析了5284树脂体系的基体树脂特性与固化工艺条件,初步确定了定位胶黏剂的配方.研究了定位胶黏剂与基体树脂的黏度特性和相容性,确定了预成型体的制备工艺.通过U型回弹、压缩回弹与金相观察分析了定位胶黏剂的定位效果及产生不同定位效果的原因.研究了加入定化胶黏剂预成型体的渗透特性及其复合材料制件的力学性能.结果表明,LSG型定位胶黏剂与树脂基体匹配良好,可以使预成型体获得良好的定位效果,且不影响复合材料的性能.
Two kinds of special taekifiers LSG - 1 and LSG - 2 were studied, which would be applied in resin transfer molding (RTM) technique to prepare 5284 resin composite. On the basis of analyzing the processing conditions and properties of the matrix resin, the ingredients of tackifers were preliminary determined. By testing the viscosity of the tackifier, 5284 resin and the compatibility between the tackifier and the matrix resin 5284, the processing condition was determined. The springbacks of U-shaped bending and compression were combined with the microphotograph of the distributing condition of the tackifer to investigate the shape- fixing performance of the tackifier. The preform was fabricated by using the tackifier, and the influences of tackifiers on the processing properties and mechanical performance were studied by testing permeability of preforms and mechanical properties of the composite. The results show that the tackifier has a satisfactory compatibility with the matrix resin, would not have any negative effect on the composite, and makes the preform have a favorable shape-fixing result.
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