TPU-based porous heterostructures by combined techniques

IF 1.1 4区 工程技术 Q4 ENGINEERING, CHEMICAL
A. Longo, Deborah Giannetti, D. Tammaro, S. Costanzo, E. Di Maio
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引用次数: 3

Abstract

Abstract The production of thermoplastic polyurethane-based porous heterostructures combining physical foaming with fused deposition modeling is detailed in this contribution. The choice of combining these two techniques lies in the possibility of creating objects endowed with a dual-scale structure at millimeter scale by fused deposition modeling and at microscopic scale by gas foaming. Thermal stability and rheological properties of the neat polymer were studied prior to foaming to design a suitable processing protocol and three different combined techniques are proposed: pressure quench, temperature rise and direct 3D foam printing. Foam morphologies were evaluated by SEM and foamed samples were characterized by thermal and mechanical analyses to highlight the differences among the combined processing techniques. Samples foamed via pressure quench exhibit the highest degree of crystallinity and a uniform cell morphology, also resulting in the largest stiffness. The results presented in this contribution open up the possibility of producing objects with complex geometry and porosity architecture at the dual scale.
采用组合技术的TPU基多孔异质结构
摘要本文详细介绍了将物理发泡与熔融沉积建模相结合的热塑性聚氨酯基多孔异质结构的生产。将这两种技术相结合的选择在于,通过熔融沉积建模和气体发泡在微观尺度上创造具有毫米尺度双尺度结构的物体的可能性。在发泡之前,对纯聚合物的热稳定性和流变性能进行了研究,以设计合适的加工方案,并提出了三种不同的组合技术:压力淬火、温升和直接3D泡沫打印。通过SEM评估泡沫形态,并通过热分析和力学分析对泡沫样品进行表征,以突出组合加工技术之间的差异。通过压力淬火发泡的样品表现出最高的结晶度和均匀的细胞形态,也导致最大的刚度。该贡献中的结果为在双重尺度上生产具有复杂几何形状和孔隙度结构的物体开辟了可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
International Polymer Processing
International Polymer Processing 工程技术-高分子科学
CiteScore
2.20
自引率
7.70%
发文量
62
审稿时长
6 months
期刊介绍: International Polymer Processing offers original research contributions, invited review papers and recent technological developments in processing thermoplastics, thermosets, elastomers and fibers as well as polymer reaction engineering. For more than 25 years International Polymer Processing, the journal of the Polymer Processing Society, provides strictly peer-reviewed, high-quality articles and rapid communications from the leading experts around the world.
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