The intrinsic toughness and adhesion mechanisms of a glass/epoxy interface
The intrinsic toughness and adhesion mechanisms of a glass/epoxy interface
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玻璃/环氧树脂界面的固有韧性和粘合机制
DOI：
10.1016/s0022-5096(98)00084-2
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发表时间：
1999
影响因子：
5.3
通讯作者：
A. L. Lozanne
中科院分区：
文献类型：
--
作者：
J. Greg Swadener;K. Liechti;A. L. Lozanne
玻璃/环氧树脂界面的夹层试样断裂在稳态条件下在很宽的范围内面内模式混合。通过有限元分析计算塑性耗散，并从稳态断裂韧性中减去，以获得界面的本征韧性。有助于内在韧性的机制被发现，包括热力学功的粘附，局部非弹性变形和聚合物链拔出，但它们的组合能量只有约15%的内在韧性。断裂后的玻璃表面的角度相关的X射线光电子能谱显示环氧树脂吸附到约3 nm的深度。环氧树脂股的分裂被认为是最重要的机制，约40%的界面的固有韧性。
Glass/epoxy interfaces of sandwich specimens were fractured under steady-state conditions over a wide range of in-plane mode-mix. The plastic dissipation was calculated via finite element analysis and subtracted from the steady-state fracture toughness to obtain the intrinsic toughness of the interface. Mechanisms which contribute to the intrinsic toughness were found to include the thermodynamic work of adhesion, local inelastic deformations and polymer chain pull-out, but their combined energy was only approximately 15% of the intrinsic toughness. Angular dependent x-ray photoelectron spectroscopy of the glass surfaces after fracture revealed epoxy adsorbed to a depth of approximately 3 nm. Cleavage of epoxy strands was found to be the most significant mechanism contributing approximately 40% to the intrinsic toughness of the interface.