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Development of recyclable, lightweight polypropylene-based single polymer composites with amorphous poly-alpha-olefin matrices

机译：具有无定形聚α-烯烃基质的可再循环，轻质聚丙烯的单聚合物复合材料的研制

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In the present study, we produced and investigated polypropylene-based single-polymer composites (SPCs) using four amorphous poly-alpha-olefin (APAO) grades as matrices and two plain-woven polypropylene fabrics as reinforcement. Our goal was to investigate the applicability of APAOs as matrix materials of SPCs and to widen the processing temperature window of SPCs utilizing the low melting temperature of APAOs. We produced the composites with a double-belt press at 120 degrees C, 140 degrees C, and 160 degrees C, and investigated them by density measurement, and static tensile and dynamic falling weight impact (IFWI) tests at room temperature, -40 degrees C, and 80 degrees C. The composites showed adequate tensile and excellent dynamic mechanical properties. The tensile test results indicated that the optimal consolidation temperature is between 120 degrees C and 140 degrees C, depending on the matrix applied. Increasing the test temperature resulted in reduced tensile strength. Increasing processing temperature caused a drop in perforation energy because of the reduced extent of the delamination of the better consolidated composites. Both static and dynamic mechanical properties can be improved with the use of a stronger fabric. Furthermore, the processing temperature window can be widened with APAOs as matrix materials, and these single-polymer composites possess many beneficial properties.
机译：在本研究中，我们使用四种无定形聚α-烯烃（aaO-α-烯烃（apao）等级作为基质和两种纯编织的聚丙烯织物作为增强来制备和研究基于聚丙烯的单聚合物复合材料（SPC）。我们的目标是调查APAOS作为SPC的矩阵材料的适用性，并利用APAOS的低熔点温度扩大SPC的加工温度窗口。我们生产的复合材料，双皮带压力为120摄氏度，140℃和160摄氏度，并通过密度测量研究，并在室温下进行静态拉伸和动态下降的重量影响（IFWI）测试，-40度C和80℃。复合材料显示出足够的拉伸和优异的动态机械性能。拉伸试验结果表明，取决于所施加的基质，最佳固结温度在120摄氏度和140℃之间。增加测试温度导致拉伸强度降低。由于更好的合并复合材料的分层的程度降低，增加的加工温度导致穿孔能量下降。使用更强的织物可以提高静态和动态机械性能。此外，加工温度窗口可以用APAOS作为基质材料加宽，并且这些单聚合物复合材料具有许多有益的性质。

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