关于碳纤维增强聚乙 (PAEK) /聚乙 (PEEK) 热塑性复合材料的过成型过程的研究
Ziyue Zhao1, Jindong Zhang1, Ran Bi1
1Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
这项研究优化了用连续碳纤维增强聚乙烯基 (CCF-PAEK) 复合材料的界面粘接,通过调整在用聚乙烯基 (PEEK) 过时的模具温度. 较高的温度显著改善了剪切强度,表明复合材料性能得到了提高.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物复合材料 聚合物复合材料
- 纳米技术纳米技术
背景情况:
- 连续碳纤维增强聚 (乙) (CCF-PAEK) 复合材料提供高性能,但需要优化界面粘合结构应用.
- 聚 (乙乙) (PEEK) 和其短纤维增强变体 (SCF-PEEK) 是先进的热塑性矩阵,用于苛刻的环境.
研究的目的:
- 为了研究接口温度对SCF-PEEK/CCF-PAEK过模复合材料的接口粘接强度的影响.
- 确定最佳的加工条件,以提高这些先进复合材料的机械性能.
- 为了将实验发现与分子动力学模拟相关联.
主要方法:
- 用PAEK树脂进行压缩成型,用于CCF-PAEK层制备.
- 在不同的模具温度下将PEEK或SCF-PEEK注入到CCF-PAEK基板上.
- 短光束剪切测试以量化界面剪切强度.
- 光学显微镜用于微观结构和故障形态分析.
- 分子动力学模拟以建模界面粘附.
主要成果:
- 接口粘接强度随着模具温度的提高而显著增加,切削强度在260°C时达到85MPa,而在220°C时达到77MPa.
- 在测试范围 (380°C至420°C) 内,PEEK矩阵的化温度对剪切强度的影响微不足道.
- 对PAEK-PEEK粘附的分子动力学模拟显示与实验界面粘合能量和扩散系数结果有很好的一致性.
结论:
- 在过度成型过程中优化模具温度对于提高SCF-PEEK/CCF-PAEK复合材料的界面粘附性至关重要.
- 更高的加工温度促进了更好的分子纠和在接口上的相互作用,从而提高了剪切强度.
- 该研究为设计和制造具有卓越接口性能的高性能热塑性复合材料提供了宝贵的见解.
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