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缓慢结晶的聚乙烯基的化纤维制造:与加工和后处理参数相关的结晶性和机械性能

Lucía Doyle¹, Xabier Pérez-Ferrero², Javier García-Molleja¹

¹IMDEA Materials Institute, C/Eric Kandel, 2, Getafe, 28906 Madrid, Spain.

|December 17, 2024

概括

与快速结晶的聚乙烯基 (PEEK) 相比,PEK-A和AM-200等缓慢结晶的聚乙烯基 (PAEK) 聚合物在增材制造中表现优越. 化这些材料增强了结晶性,但需要对机械完整性进行仔细的优化.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
增材制造增材制造增材制造

背景情况:

聚乙基 (PAEK) 热塑料的进步促进了用于航空航天和国防的增材制造 (AM).
快速结晶的聚乙乙基 (PEEK) 在AM中存在局限性,包括纤维间的粘合和曲差.

研究的目的:

研究缓慢结晶的PAEK聚合物,聚乙基基 (PEKK-A) 和AM-200,用于AM应用.
与PEEK相比,将PEKK-A和AM-200的机械性能与PEEK进行比较.

主要方法:

在无形状态下增材制造PEKK-A和AM-200.
制以诱导结晶性和评估机械性能.
拉伸强度和结晶性的比较分析.

主要成果:

正如印刷的PEKK-A和AM-200实现了注塑拉伸强度的80%左右,显著超过PEEK (~25%).
化增加了结晶度 (PEKK-A 的15.7%,AM-200 的19%),但引起了孔隙凝聚.
火改善了灯丝方向强度,而Z方向强度仍然受到层间粘附的限制.

结论:

缓慢结晶的PAEK由于其改善的机械性能,比PEEK提供了增强的AM潜力.
优化回火对于平衡结晶性增长与潜在的机械完整性妥协至关重要.
需要进一步的研究来完善处理-结构-属性关系,以便在AM中更广泛地应用PAEK.

关键词:

通过3D打印打印3D打印.聚乙烯基的聚乙烯基.烧焦的烧焦方式化丝制造工艺化丝制造工艺层间的粘附层间的粘附机械性能机械性能机械性能多孔性多孔性

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