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首页> 外文期刊>Journal of Applied Polymer Science >Surface preparation for adhesive bonding of polycyanurate-based fiber-reinforced composites using atmospheric plasma treatment
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Surface preparation for adhesive bonding of polycyanurate-based fiber-reinforced composites using atmospheric plasma treatment

机译：采用大气等离子体处理的聚氰脲酸酯基纤维增强复合材料的粘合剂表面制备

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摘要

In this article, the effects of atmospheric plasma treatment on the microstructural, chemical, and mechanical behavior of epoxy-bonded polycyanurate composites are investigated. Adhesive bond strength of plasma-treated specimens exhibited strength increases of over 35% to that of peel-ply and solvent-wiped surface preparation techniques. The improvements were as much as 50% greater than those obtained using abrasive surface preparation techniques. X-ray photoelectron spectroscopy analysis showed an increase in the surface concentration of oxygen as a function of plasma treatment passes. However, the levels were substantially lower than that of epoxy composites treated under identical conditions. In addition, the concentration of carboxyl groups (O-C=O), which have been associated with improved adhesive strength in epoxy-based composites, was shown to saturate in cyanate ester composites after a much lower exposure period than what was observed when treating epoxies. The effect of plasma surface treatment on the surface morphology of the cyanate ester composite was also studied using scanning electron microscopy and atomic force microscopy. Atomic force microscopy analysis showed a progressive increase in surface roughness with treatment; however, this increase only translated into a marginal increase in surface area and is not believed to contribute significantly to adhesive strength.
机译：在本文中，研究了大气等离子体处理对环氧键合聚氰尿酸酯复合材料的微观结构，化学和机械性能的影响。与经剥离和溶剂擦拭的表面制备技术相比，经等离子体处理的样品的粘合强度显示出超过35％的强度增加。与使用磨料表面制备技术所获得的改进相比，改进幅度高达50％。 X射线光电子能谱分析表明，随着等离子体处理次数的增加，氧气的表面浓度增加。然而，该水平明显低于在相同条件下处理的环氧复合材料的水平。另外，与环氧树脂基复合材料相比，羧基浓度（O-C = O）与环氧基复合材料的粘合强度提高有关，在氰酸酯复合材料中暴露的时间比处理环氧树脂低得多。还使用扫描电子显微镜和原子力显微镜研究了等离子体表面处理对氰酸酯复合材料表面形态的影响。原子力显微镜分析显示，处理后表面粗糙度逐渐增加;然而，这种增加仅转化为表面积的少量增加，并且不被认为对粘合强度有显着贡献。

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