Abstract One of the problems in type-IV pressure vessels (composite pressure vessels with a thermoplastic inner liner) is the quality of bonding between the liner to the outer reinforcement layer. In the present research, the effect of the ultraviolet (UV) irradiation on the surface of the high-density polyethylene (HDPE) for the co-bonding process of E-glass/epoxy composites to HDPE liner was investigated experimentally. To recognize the effect of the UV irradiation on the surface properties, the contact angle measurement, and the atomic force microscopy (AFM) were performed. Asymmetric double cantilever beams (ADCB) tests were conducted to determine the strain energy release rate (SERR) as a factor indicating the crack resistance of the joint. According to the results, it was found that 20 minutes of UV irradiation exposure time presented the lowest contact angle on the surface of HDPE, and the highest strain energy release rate in ADCB specimens. The result of the tensile test for HDPE under the UV radiation demonstrated less than 8% degradation in the mechanical properties. Therefore, it can be concluded that 20 minutes of UV irradiation exposure time could be used as a surface treatment of the HDPE liner of type-IV pressure vessels.

中文翻译：

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使用紫外线照射改善聚乙烯与 E 玻璃/环氧树脂复合材料的粘合

摘要 IV型压力容器（具有热塑性内衬的复合压力容器）的问题之一是内衬与外加强层之间的结合质量。在目前的研究中，通过实验研究了紫外线 (UV) 照射对高密度聚乙烯 (HDPE) 表面的影响，用于将 E 玻璃/环氧树脂复合材料与 HDPE 衬里的共粘合过程。为了识别紫外线照射对表面特性的影响，进行了接触角测量和原子力显微镜 (AFM)。进行非对称双悬臂梁 (ADCB) 测试以确定应变能释放率 (SERR) 作为指示接头抗裂性的一个因素。根据结果​​，结果表明，20分钟的UV照射暴露时间在ADCB试样中表现出最低的HDPE表面接触角和最高的应变能释放率。在紫外线辐射下对 HDPE 进行拉伸试验的结果表明，其机械性能的退化小于 8%。因此，可以得出结论，20分钟的紫外线照射暴露时间可以作为IV型压力容器HDPE内衬的表面处理。