苎麻纤维／聚丙烯混纺混织增强复合材料的制备与性能研究

本文将改性的苎麻与树脂混纺或混织的织物在热压机上压制成苎麻纤维与树脂的复合板材。研究了织物组织结构、PP纱线在织物纬向上的含量等对苎麻／PP增强复合材料拉伸性能的影响。结果显示，对于混织预制体，当层数为5层，模压温度为175℃，模压压力为10MPa，苎麻／PP为1：1时，板材的拉伸性能最优，拉伸强度是83．03MPa；并且，由于斜纹组织的纱线伸直状态最好，所以其复合材料的机械性能优于缎纹组织和平纹组织复合材料。对于混纺预制体，模压温度为170℃，压力为12．5MPa，模压时间为20min，苎麻纤维体积分数为50％时，复合材料的拉伸性能最优，对于不同组织的织物，缎纹组织的复合材料的拉伸性能最好。

The Preparation and the Study of the Performance of the Enhanced Compound Materials Which is Composed of Cospinning or Blend-weaving Textiles of Modified Ramie Fibers and Polypropylene

The composite sheets were fabricated from cospinning or blend-weaving textiles of modified ramie fibers and polymer in hot-pressing. The influences of textile tissue structure and PP yarn content in textile weft on the tensile property of ramie/PP forced sheets were investigated. It found that for the blend-weaving perform, when the layer was five, the moulded temperature was 175 ℃, the moulded pressure was 10MPa, and the ratio of ramin fiber and PP was 1：1. the sheet stretchability was prominent. Tensile strength is 83.03 MPa And due to yarn good stretching in the twill-weave textile, the mechanical property of composite sheets prepared from twill-weave was more excellent than that from satin-weave and plain-weave. While. for the cosplnning perform, when the moulded temperature was 170 ℃. the moulded pressure wasl2.SMPa, and the volume fraction of ramin fiber was 50%. the tensile performance was distinguished. furthermore as for composite sheets of different tissue textiles, the stretch property of composite sheets prepared from satinl-weave was best.