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首页> 外文期刊>Journal of Polymers and the Environment >Effect of Accelerated Weathering on Biocomposites Processed by SMC and Compression Molding
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Effect of Accelerated Weathering on Biocomposites Processed by SMC and Compression Molding

机译：加速风化对SMC和压塑成型生物复合材料的影响

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The durability of biocomposites utilized for building components has been a subject of recent concern and questioning. To address these concerns, the long-term effects of weathering on biocomposites used as building components were evaluated using an accelerated weatherometer. The biocomposite samples were processed by sheet molding compounding (SMC) panel processing and/or compression molding. The accelerated weatherometer served to expose the samples to ultraviolet radiation (UV), condensation, and water spray at levels pertinent to actual conditions: 48 cycles of UV (340 nm) treatment at 60 ℃ for 2.5 h was followed by water spray for 0.5 h, and then condensation at 45 ℃ for 24 h. Twelve cycles were repeated in each test, and the total duration for the complete test was 2016 h. Measurements for color, surface roughness test weight change, and dynamical mechanical analysis were taken at regular intervals of time. It was found that the surface roughness increased, as the color changed, and storage modulus decreased with increases in the exposure time of the samples to accelerated weathering conditions, compared to their properties at the beginning of the test.
机译：用于建筑构件的生物复合材料的耐久性已成为最近关注和质疑的主题。为了解决这些问题，使用加速天气计评估了风化对用作建筑构件的生物复合材料的长期影响。通过片状模塑料（SMC）面板处理和/或压模来处理生物复合材料样品。加速气候计用于使样品暴露于与实际条件有关的水平的紫外线（UV），冷凝和喷水：在60℃下进行48次UV（340 nm）处理2.5小时，然后喷水0.5 h ，然后在45℃下冷凝24小时。每次测试重复十二个周期，完整测试的总持续时间为2016 h。定期进行颜色，表面粗糙度测试重量变化和动态力学分析的测量。已发现，与颜色在测试开始时相比，随着样品在加速风化条件下的暴露时间增加，表面粗糙度随颜色变化而增加，而储能模量则随样品的减少而降低。

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