A comparative experimental work on the drop-weight impact responses of thermoplastic polymers produced by additive manufacturing: combined influence of infill rate, test temperature, and filament material

IF 2.2 4区 化学 Q3 CHEMISTRY, PHYSICAL
Çağın Bolat, Abdulkadir Çebi, Hasan Ispartalı, Berkay Ergene, Muhammed Turan Aslan, Mert Göksüzoğlu
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Abstract

In recent years, the topic of additive manufacturing of polymer materials has gained high acceleration in terms of scientific aspects due to the perfect prototyping capacity, clean production ability, and fast manufacturing opportunity of layer-by-layer fabrication technology. However, the majority of the studies have been directed to the exploration of the mechanical performance of three-dimensional (3D)-printed materials according to changing production variables. Different from the previous efforts, this experimental work is the first initiative to comprehend the low and high-speed mechanical performance of two different thermoplastic materials depending on the shifting test temperatures in a comparative manner. For polylactic acid (PLA) and polyamide 6 (PA6), the combined effect of the infill rate and high-speed drop weight deformation was analyzed for the first time in the technical literature. For this purpose, low-speed tensile tests, differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) analyses, drop-weight impact tests, and damage inspections were made elaboratively. The results showed that PLA samples had superior mechanical responses at 25 °C, but the case was the opposite and in favor of PA6 above the glass transition. Specific absorbed energy values increased with decreasing infill rates both for PLA and PA6. Furthermore, PA6 samples remained united after the drop-weight deformation at higher temperatures, while PLA lost its integrity.

Graphical abstract

Abstract Image

增材制造热塑性聚合物落重冲击响应对比实验:填充率、测试温度和长丝材料的综合影响
近年来,由于逐层制造技术具有完美的原型设计能力、清洁生产能力和快速制造机会,高分子材料的增材制造这一课题在科学方面获得了高速发展。然而,大多数研究都是针对三维(3D)打印材料的力学性能随生产变量变化的探索。与以往的研究不同,本实验工作首次以对比的方式理解了两种不同热塑性材料随试验温度变化而产生的低速和高速机械性能。对于聚乳酸(PLA)和聚酰胺 6(PA6),技术文献中首次分析了填充率和高速滴重变形的综合影响。为此,对低速拉伸试验、差示扫描量热法(DSC)和动态力学分析(DMA)分析、落重冲击试验和损伤检查进行了详细的研究。结果表明,聚乳酸样品在 25 °C时具有更优越的机械响应,但情况恰恰相反,在玻璃化转变以上时对 PA6 更有利。聚乳酸和 PA6 的比吸收能值随着填充率的降低而增加。此外,在较高温度下,PA6 样品在滴重变形后仍保持完整,而聚乳酸则失去了其完整性。
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来源期刊
Colloid and Polymer Science
Colloid and Polymer Science 化学-高分子科学
CiteScore
4.60
自引率
4.20%
发文量
111
审稿时长
2.2 months
期刊介绍: Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.
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