分散相含量对POE/PTT原位成纤增强复合材料性能的影响

Effect of Contents of Dispersed Phase on Properties of PTT/POE In-situ Fiber Reinforced Composite

采用微纳叠层共挤制备了乙烯一辛烯共聚物/聚对苯二甲酸丙二醇酯(POE/PTT)原位成纤复合材料,通过扫描电子显微镜分析了分散相PTT含量对其在基体中的形态及分布的影响;讨论了PTT含量对复合材料静态力学性能的影响,利用差示扫描量热仪分析了PTT对POE基体结晶性能的影响。结果表明,随着分散相含量的提高,PTT微纤的数量逐渐增加,降低了POE基体的结晶度,当POE/PTT质量比为85/15时,拉伸强度较纯POE提高了16.9%。

POE/PTT in-situ fiberized reinforcing composites were prepared by a method of micro- nano laminated co-extrusion. Morphology of the dispersed phase of PTT in micro-nano laminated extrusion composites was analyzed by using SEM. Effect of adding quantity of PTT in composites on static mechanical performance was discussed. DSC analysis was used to study the effect of PTT in the complex system on crystallization properties of POE. The result indicated that in the in-situ fiber reinforcing composites, with the dispersed phase content increased, the number of PTT microfibers gradually increased, while the crystallization of POE decreased. Compared with neat POE, the tensile strength of in-situ fiber reinforcing composites was improved by 16.9% while POE/PTT was 85/15.