Rheological behavior of neat and carbon fiber‐reinforced poly(ether ketone ketone) for extrusion deposition additive manufacturing
Rheological behavior of neat and carbon fiber‐reinforced poly(ether ketone ketone) for extrusion deposition additive manufacturing
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用于挤出沉积增材制造的纯纤维和碳纤维增强聚（醚酮酮）的流变行为
DOI：
10.1002/pen.25362
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发表时间：
2020
影响因子：
3.2
通讯作者：
Duty, Chad
中科院分区：
文献类型：
--
作者：
Kishore, Vidya;Ajinjeru, Christine;Hassen, Ahmed A.;Lindahl, John;Kunc, Vlastimil;Duty, Chad
为了开发用于挤压添加剂制造(AM)系统的新材料，对流变性的基本了解对于关联加工对材料结构及其性能的影响是至关重要的。本文报道了五种不同牌号的纯净和碳纤维增强聚醚酮酮的流变性能。流变性是了解增强纤维和AM工艺参数(如时间、温度、环境和剪切速率)对加工过程中流动行为的影响的关键。小幅振荡剪切试验和稳定剪切试验表明，在空气中加工时，纯净级的粘度随时间的增加比填充碳纤维的级更小。填充级材料表现出较大的剪切变稀和较低的温度敏感性。总体而言，这一流变学分析为确定此类高温聚合物体系的挤出沉积AM的合适工艺条件提供了一个广泛的框架。
To develop new materials for extrusion additive manufacturing (AM) systems, a fundamental understanding of rheological properties is essential to correlate the effect of processing on material structure and its properties. In this work, the rheological properties of five different grades of neat and carbon fiber (CF)‐reinforced poly(ether ketone ketone) are reported. Rheological properties are essential to understand the effect of reinforcing fibers and AM process parameters such as time, temperature, environment, and shear rate on flow behavior during processing. Small‐amplitude oscillatory shear tests and steady shear tests indicated neat grades to exhibit less increase in viscosity over time when processed in air than the CF‐filled grades. The filled grades showed greater shear thinning and lower sensitivity to temperature. Overall, this rheological analysis provides a broad framework for determining appropriate processing conditions for extrusion deposition AM of such high‐temperature polymer systems.
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