Wood-plastic composites (WPCs) are new generation materials widely used in outdoor conditions; however, the appearance and mechanical properties of WPCs change with exposure to weather. In this study, high-density polyethylene-based flat-pressed WPCs are reinforced with carbon and glass fibre-woven fabrics for uses where high mechanical properties are needed in outdoor conditions. For this purpose, WPCs are exposed to accelerated weathering conditions to determine the effect of weathering with and without reinforcement. The results show that, after weathering, colour changes are inevitable for WPCs. Attenuated total reflection–Fourier transform-infrared analysis reveals the changes in the matrix's chemical structure, illustrating the alterations in WPC surface characteristics. The mechanical properties of WPCs decrease as a result of photodegradation. However, the reinforced WPCs have higher mechanical properties than the control samples, despite extensive degradation. Carbon fibre (200 g/m²) achieved the greatest flexural strength and modulus of elasticity, 150% and 122% higher, respectively, than unreinforced WPCs. Scanning electron microscopy analysis shows that, despite the intensive photodegradation on the surface, the integration of the matrix and woven fabrics was still strong. The surface erosion was observed with light microscopy. The visual appearance also exhibited some changes that occurred on the surface of WPCs.

中文翻译：

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碳纤维和玻璃纤维织物增强木塑复合材料的加速老化性能

木塑复合材料（WPC）是广泛用于户外条件的新一代材料；然而，WPC 的外观和机械性能会随着暴露在天气中而发生变化。在这项研究中，基于高密度聚乙烯的平压 WPC 采用碳纤维和玻璃纤维编织织物增强，用于在户外条件下需要高机械性能的用途。为此，将 WPC 暴露在加速风化条件下，以确定有无加固的风化效果。结果表明，在风化后，WPC 的颜色变化是不可避免的。衰减全反射-傅里叶变换-红外分析揭示了基质化学结构的变化，说明了 WPC 表面特性的变化。WPC 的机械性能由于光降解而降低。然而，增强的 WPC 具有比对照样品更高的机械性能，尽管有广泛的降解。碳纤维（200 克/平方米² ) 实现了最大的弯曲强度和弹性模量，分别比未增强的 WPC 高 150% 和 122%。扫描电子显微镜分析表明，尽管表面发生了强烈的光降解，但基体和机织物的结合仍然很强。用光学显微镜观察表面侵蚀。视觉外观也显示出 WPC 表面发生的一些变化。