大隔距覆增强结构柔性空间膜材料的制备及力学性能

Preparation and Mechanical Properties of Ultra-gauge Flexible Spacer Membrane Material Covered with Reinforced Structure

针对提高大隔距柔性膜材料力学性能的迫切需求,通过在大隔距经编间隔织物两表面复合具有增强结构的高分子层,得到大隔距覆增强结构柔性空间膜材料(UGFM),采用控制变量法,分别测试高分子层有增强结构和无增强结构的UGFM撕裂、剥离、间隔向拉断力等力学性能。结果表明,UGFM表面复合的高分子层在引入增强结构后对其力学性能的影响较大。采用面密度为150 g/m2的机织物作增强结构时,UGFM的经向剥离性能降低了约47.7%,纬向剥离性能降低了约51.0%,经向撕裂性能提高了约37.9%,纬向撕裂性能提高了约30.8%,同间隔距离下间隔向拉伸性能提升了约5.8%。最后探讨了具有增强结构的高分子层对UGFM力学性能影响的机理,UGFM经纬向撕裂和剥离性能的差异化特征主要受间隔织物表面组织结构影响,若破坏失效方向与线圈平行,则失效趋势迅速,若不平行,则失效趋势放缓。同时UGFM间隔向拉伸断裂性能主要受织物间隔距离影响较大,有无增强结构对UFGM间隔向拉伸性能影响微弱。

According to the urgent need of improving the mechanical properties of the ultra-gauge flexible membrane materi‐al,the ultra-gauge flexible spacer membrane material(UGFM)covered with reinforced structure was obtained by the composition of polyvinyl chloride polymer layer with reinforced structure on two surfaces of ultra-gauge warp-knitted spacer fabric.Adoping the control variable method,the mechanical properties of UGFM which carring polymer layer with reinforced structure or not,such as tearing,stripping and interval tensile force,were researched.The results show that the mechanical properties of UGFM are greatly affected by the introduction of the polymer layers with reinforced structure which are laminated on the surface.When the woven fabric with a surface density of 150 g/m~2 is used as the reinforced structure,the warp stripping performance of UGFM is reduced by47.7%,the weft stripping performance is reduced by 51.0%,the warp tearing performance is improved by 37.9%,the weft tearing performance is improved by 30.8%,and interval tensile force is improved by 5.8%during the same interval distance.In the end,the mechanism of the effect of polymer layer with reinforced structure on the mechanical properties of UGFM was also discussed,the different characteristics of the warp and weft tearing and stripping properties of UGFM are mainly affected by the surface structure of spacer fabric.If the failure direction is parallel to the loops,the failure trend is rapid;if not,the failure trend is slow.At the same time,the interval tensile fracture property of UGFM is mainly affected by the interval distance between fabircs,while the reinforce‐ment structure has little effect on the interval tensile property of UGFM.