Purpose

This paper aims to focus on the development of the three-dimensional (3D) printing filaments based on acrylonitrile butadiene styrene (ABS) copolymer and styrene-ethylene/butylene-styrene (SEBS) block copolymer, with tailored viscoelastic properties and controlled flow during the 3D printing process.

Design/methodology/approach

In this investigation, ABS was blended with various amounts of SEBS via a melt mixing process. Then the ABS/SEBS filaments were prepared by a single-screw extruder and printed by the FDM method. The rheological properties were determined using an MCR 501 from Anton-Paar. The melt flow behavior of ABS/SEBS filaments was determined. The morphology of the filaments was studied by scanning electron microscope and the mechanical (tensile and impact) properties, surface roughness and void content of printed samples were investigated.

Findings

The rheological results can accurately interpret what drives the morphology and mechanical properties’ changes in the blends. The impact strength, toughness, elongation-at-break and anisotropy in mechanical properties of ABS samples were improved concurrently by adding 40 Wt.% of SEBS. The optimal tensile properties of blend containing 40 Wt.% SEBS samples were obtained at −45°/+45° raster angle, 0.05 mm layer thickness and XYZ build orientation. Optimized samples showed an 890% increase in elongation compared to neat ABS. Also, the impact strength of ABS samples showed a 60% improvement by adding 40 Wt.% SEBS.

Originality/value

The paper simultaneously evaluates the effects of material composition and 3D printing parameters (layer thickness, raster angle and build orientation) on the rheology, morphology, mechanical properties and surface roughness. Also, a mechanical properties comparison between printed samples and their compression-molded counterpart was conducted.

中文翻译：

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通过与SEBS TPE共混来调整用于FDM的ABS细丝的物理机械性能和流变行为

目的

本文旨在专注于开发基于丙烯腈丁二烯苯乙烯（ABS）共聚物和苯乙烯-乙烯/丁烯-苯乙烯（SEBS）嵌段共聚物的三维（3D）印刷长丝，该纤维具有定制的粘弹性和可控的流动性。 3D打印过程。

设计/方法/方法

在这项研究中，ABS通过熔融混合工艺与各种数量的SEBS混合。然后通过单螺杆挤出机制备ABS / SEBS长丝，并通过FDM方法进行印刷。使用Anton-Paar的MCR 501测定流变性质。测定了ABS / SEBS长丝的熔体流动行为。通过扫描电子显微镜研究了长丝的形态，并研究了印刷样品的机械（拉伸和冲击）性能，表面粗糙度和空隙率。

发现

流变结果可以准确地解释是什么驱动了共混物的形态和机械性能的变化。加入40％（重量）的SEBS可以同时提高ABS样品的冲击强度，韧性，断裂伸长率和各向异性。在-45°/ + 45°光栅角，0.05 mm层厚度和XYZ生成取向下，获得了包含40 wt％SEBS样品的混合物的最佳拉伸性能。与纯净的ABS相比，优化的样品显示出890％的伸长率。此外，通过添加40重量％SEBS，ABS样品的冲击强度显示出60％的提高。

创意/价值

本文同时评估了材料成分和3D打印参数（层厚度，光栅角度和构建方向）对流变性，形态，机械性能和表面粗糙度的影响。另外，进行了印刷样品和它们的压缩成型对应物之间的机械性能比较。