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首页> 外文期刊>Journal of Applied Polymer Science >Investigation of 3D printing strategy on the mechanical performance of coextruded continuous carbon fiber reinforced PETG
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Investigation of 3D printing strategy on the mechanical performance of coextruded continuous carbon fiber reinforced PETG

机译：共挤出连续碳纤维强化PETG的3D打印策略研究

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摘要

Fused filament fabrication (FFF) has been used to create prototypes and functional parts for various applications using plastic filaments. It has also been extended to the use of continuous fibers for reinforcing thermoplastic polymers. This study aims to optimize the deposition design of a coextruded continuous carbon fiber (CCF) composite filament with a polyethylene terephthalate glycol-modified (PETG) filament. The characterizations on the raw materials revealed that the matrix polymer in CCF composite filament had similar physicochemical properties as PETG, and carbon fibers were homogeneously distributed in CCF filament. The effect of raster orientation and shells number on the mechanical properties of non-reinforced and coextruded CCF-reinforced PETG was investigated. The highest mechanical properties were obtained at a raster orientation of 0 degrees for both reinforced and non-reinforced materials. With the increase of raster orientation, Young's modulus and ultimate tensile strength decreased. The presence of shells improved the tensile strength of non-reinforced PETG. For composite samples printed with unreinforced shells, Young's modulus decreased due to decrease in fibers content, and elongation at break and ultimate tensile strength increased. Tomographic observations showed that the mechanical behavior of printed specimens depended on the anisotropy of porosity in printed specimens.
机译：熔融灯丝制造（FFF）已用于使用塑料灯丝制造各种应用的原型和功能部件。它还扩展到使用连续纤维增强热塑性聚合物。本研究旨在优化共挤出连续碳纤维（CCF）复合长丝与聚对苯二甲酸乙二醇酯（PETG）改性（PETG）长丝的沉积设计。对原材料的表征表明，CCF复合长丝中的基体聚合物具有与PETG相似的物理化学性质，碳纤维均匀分布在CCF长丝中。研究了光栅取向和壳数对非增强和共挤共聚焦纤维增强PETG力学性能的影响。对于增强材料和非增强材料，在光栅方向为0度时获得最高的机械性能。随着光栅取向的增加，杨氏模量和极限抗拉强度降低。壳体的存在提高了未增强PETG的抗拉强度。对于使用未加筋外壳印刷的复合材料样品，由于纤维含量的减少，杨氏模量降低，断裂伸长率和极限拉伸强度增加。层析观察表明，印刷试样的力学行为取决于印刷试样中孔隙率的各向异性。

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