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In Situ Wire Drawing of Phosphate Glass in Polymer Matrices for Material Extrusion 3D Printing

机译:在材料挤出3D印刷中磷酸盐玻璃的原位丝网图

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摘要

A strategy to increase the amount of materials available for additive manufacturing platforms such as material extrusion 3D printing (ME3DP) is the creation of printable thermoplastic composites. Potential limiters to the incorporation of filler materials into a thermoplastic resin include agglomeration of the filler materials, which can compromise the mechanical properties of the material system and a static morphology of the filler material. A potential solution to these issues is the use of filler materials with low glass transition temperatures allowing for a change in morphology during the extrusion process. Here, we successfully demonstrate the drawing of phosphate glass particles into a wire-like morphology within two polymeric systems: (1) a rubberized acrylonitrile butadiene styrene (ABS) blend and (2) polylactic acid (PLA). After applying a normalization process to account for the effect of air gap within the 3D printed test specimens, an enhancement in the mechanical properties was demonstrated where an increase in strength was as high as 21% over baseline specimens. Scanning electron microanalysis was used to characterize the fracture surface and wire drawing efficacy. Factors affecting the ability to achieve wire drawing such as polymer viscosity and print temperature are also highlighted.
机译:增加用于添加剂制造平台(如材料挤出3D打印(ME3DP)的材料的材料的策略是采用可印刷热塑性复合材料的产生。将填料材料掺入热塑性树脂中的潜在限制仪包括填充材料的附聚,这可以损害材料系统的机械性能和填充材料的静态形态。这些问题的潜在解决方案是使用具有低玻璃化转变温度的填充材料,允许在挤出过程中改变形态。这里,我们成功地证明了磷酸盐玻璃颗粒的图形在两个聚合物系统中的电线形态:(1)橡胶丙烯腈丁二烯苯乙烯(ABS)共混物和(2)聚乳酸(PLA)。在施加归一化过程以考虑3D印刷试样内的空气间隙的影响后,证明了机械性能的增强,其中强度的增加高达21%,在基线样本上高达21%。扫描电子微扫描用于表征裂缝表面和线材贴图功效。还突出了影响诸如聚合物粘度和印刷温度的诸如聚合物粘度和印刷温度的能力的因素。

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