The purpose of this study was to produce dimensionally accurate and reliable fused layer modeling (FLM) feedstock composed of an impact modified polypropylene matrix, compounded with a cellulose nanofiber (CNF) reinforcement and coupled by a maleic anhydride coupling agent to produce comparable mechanical properties in comparison to the industry-standard method of injection molding (IM).,A spray dried CNF (SDCNF) was compounded with the polymer matrix using a masterbatch method. The composite was diluted with neat polymer and extruded into a filament and then printed into standardized mechanical testing samples. For comparison, the filament was chopped and standardized samples were produced with IM.,A loss in mechanical properties of up to 30% was observed in FLM samples. If normalized to reflect improved density from a part consolidation method, losses are reduced to 15% or show improvements in the neat polymer matrix.,Limited research has been done on producing FLM feedstock, reporting mechanical property results based on standardized testing and comparing the same material with IM.

中文翻译：

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比较来自注塑 (IM) 和熔融层成型 (FLM) 工艺的抗冲改性聚丙烯共聚物 (IMPP) 的机械性能

本研究的目的是生产尺寸准确且可靠的熔融层建模 (FLM) 原料，该原料由抗冲改性聚丙烯基体组成，与纤维素纳米纤维 (CNF) 增强材料复合，并通过马来酸酐偶联剂偶联，以产生可比的机械性能。与注塑成型 (IM) 的行业标准方法相比，使用母料方法将喷雾干燥的 CNF (SDCNF) 与聚合物基质混合。复合材料用纯聚合物稀释并挤出成细丝，然后打印成标准化的机械测试样品。为了进行比较，将长丝切碎并使用 IM 生产标准化样品。在 FLM 样品中观察到机械性能损失高达 30%。如果归一化以反映零件固结方法提高的密度，