Varga László József, Bárány Tamás
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary.
Polymers (Basel). 2020 Jun 26;12(6):1429. doi: 10.3390/polym12061429.
We developed polypropylene-based single-polymer composites (PP-SPC) with blends of amorphous poly-alpha-olefin (APAO) and random polypropylene copolymer (rPP) as matrix material and polypropylene (PP) woven fabric as reinforcement. Our goal was to utilize the lower melting temperature of APAO/rPP blends to increase the consolidation of the composites and decrease the heat load of the PP reinforcement. We produced the composites by film-stacking at 160 °C, and characterized the composites with density, peel, static tensile and dynamic falling weight impact tests, and by scanning electron microscopy. The results indicate that consolidation can be enhanced by increasing the APAO content of the matrix. We found that the APAO content of 50% is optimal for tensile properties. With increasing APAO content, the perforation energy decreased, but even the well-consolidated composites showed very high perforation energy. In the case of a pure APAO matrix, fiber content can be increased up to 80 wt% without a severe loss of consolidation, resulting in good tensile properties. The PP-SPCs developed possessed excellent mechanical properties, and well-consolidated composites can be produced with APAO/rPP blends as a matrix with high fiber content.
我们开发了以无定形聚α-烯烃（APAO）与无规聚丙烯共聚物（rPP）的共混物为基体材料、聚丙烯（PP）机织物为增强材料的聚丙烯基单聚合物复合材料（PP-SPC）。我们的目标是利用APAO/rPP共混物较低的熔融温度来提高复合材料的固结程度，并降低PP增强材料的热负荷。我们通过在160°C下进行薄膜堆叠来制备复合材料，并通过密度、剥离、静态拉伸和动态落锤冲击试验以及扫描电子显微镜对复合材料进行表征。结果表明，通过增加基体中APAO的含量可以提高固结程度。我们发现，50%的APAO含量对于拉伸性能是最佳的。随着APAO含量的增加，穿孔能量降低，但即使是固结良好的复合材料也显示出非常高的穿孔能量。在纯APAO基体的情况下，纤维含量可以增加到80 wt%而不会严重损失固结程度，从而获得良好的拉伸性能。所开发的PP-SPC具有优异的机械性能，并且可以使用APAO/rPP共混物作为基体、高纤维含量来制备固结良好的复合材料。
