Rheological survey of carbon fiber-reinforced high-temperature thermoplastics for big area additive manufacturing tooling applications
Rheological survey of carbon fiber-reinforced high-temperature thermoplastics for big area additive manufacturing tooling applications
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DOI：
10.1177/0892705719873941
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发表时间：
2019-09-08
影响因子：
3.3
通讯作者：
Duty, Chad
中科院分区：
文献类型：
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作者：
Ajinjeru, Christine;Kishore, Vidya;Duty, Chad
碳纤维增强热塑性复合材料以其优异的热学性能和力学性能被广泛应用于各种结构领域。橡树岭国家实验室制造示范设施开发的大面积增材制造（BAAM）系统已用于制造几种复合材料部件、示范车辆、模具和模具。这些部件是用各种cf增强热塑性塑料设计和制造的。在这项研究中，研究了增材制造中常用的一种材料的动态流变学和机械性能，即20%的cf -丙烯腈-丁二烯-苯乙烯（ABS），以及三种cf增强的高温聚合物，25%的cf -聚苯砜（PPSU）， 35%的cf -聚醚砜（PES）和40%的cf -聚苯硫醚（PPS），用于打印模具。研究了复合材料的粘弹性性能，即存储模量、损失模量、tan δ和复合粘度，并分析了复合材料的流变行为与BAAM挤压和珠状形成过程的关系。结果显示，在所有测试频率下，20% CF-ABS和40% CF-PPS的弹性成分更占优势，而25% CF-PPSU和35% CF-PES的粘性成分更占优势。然后，这种粘弹性行为被用于BAAM系统挤压过程中的沉积和头形成过程。
Carbon fiber (CF)-reinforced thermoplastic composites have been widely used in different structural applications due to their superior thermal and mechanical properties. The big area additive manufacturing (BAAM) system, developed at Oak Ridge National Laboratory's Manufacturing Demonstration Facility, has been used to manufacture several composite components, demonstration vehicles, molds, and dies. These components have been designed and fabricated using various CF-reinforced thermoplastics. In this study, the dynamic rheological and mechanical properties of a material commonly used in additive manufacturing, 20 wt% CF-acrylonitrile butadiene styrene (ABS), as well as three CF-reinforced high-temperature polymers, 25 wt% CF-polyphenylsulfone (PPSU), 35 wt% CF-polyethersulfone (PES), and 40 wt% CF-polyphenylene sulfide (PPS), used to print molds were investigated. The viscoelastic properties, namely storage modulus, loss modulus, tan delta, and complex viscosity, of these composites were studied, and the rheological behavior was related to the BAAM extrusion and bead formation process. The results showed 20 wt% CF-ABS and 40 wt% CF-PPS to display a more dominant elastic component at all frequencies tested while 25 wt% CF-PPSU and 35 wt% CF-PES have a more dominant viscous component. This viscoelastic behavior is then used to inform the deposition and bead formation process during extrusion on the BAAM system.