成型工艺对PP/亚麻包缠纱力学性能的影响(英文)

Effect of process parameters on the mechanical properties of co-wrapped PP/flax yarn

研究了织造与成型工艺对热塑性PP/亚麻包缠纱预制件及复合材料力学性能的影响.结果表明,包缠纱可形成预制件用于纺织结构复合材料加工.织造密度的变化对复合材料性能有较大的影响,综合织造的便利性和复合材料经纬向拉伸性能共同的作用,可以设定经密在较小的范围而控制纬密在适中的水平.通过正交设计和方差分析的方法,优化热压成型工艺参数,优化结果为压力6MPa,时间5min,温度185℃.利用包缠法的天然亚麻纤维和热塑性PP制成的热压复合材料,具有较好的结合界面和较优的力学性能,同时包缠纱为纤维增强复合材料成型提供了经济可行的预制件加工方法.

The effect of weaving and process parameters on the mechanical properties of thermoplastic preforms and composites produced from co-wrapped PP/flax yam were investigated. The results show that the co-wrapped yams can be used to form textile preforms for manufacturing textile structural composites. The changes in weaving density have greater impact on the tensile properties of composite sheets, an integrated facilitative weaving and the tensile properties in warp and weft of composites to a collaborative role can be set at a smaller warp density range and a moderate level of weft density. By orthogonal design and analysis of variance method, optimize the hot forming process parameters on properties of composites, with 6 MPa, 5 rain and 185℃. The hot-pressing thermoplastic composites with co-wrapped yams preforms from natural flax fibers and thermoplastic resin PP, have better combination of interface and mechanical properties, and co-wrapped yam as a form of preforms provide an economic and effective way to preparation for the continuous fiber reinforced thermoplastic resin composites.