Alghamdi Mohammed N
Department of Mechanical Engineering Technology, Yanbu Industrial College, Yanbu Al-Sinaiyah City 41912, Saudi Arabia.
Polymers (Basel). 2022 Jul 18;14(14):2913. doi: 10.3390/polym14142913.
The by-product abundances of fly ash allow them to be used as the reinforcing filler for high-volume and high-performance thermoplastic composites. However, the durability of the composites remains questioned as polymer degradation during environmental weathering creates brittle materials, leading to surface cracks, which potentially release hazardous fly ash particles into the environment. This paper reports the effect of environmental ageing (UV and moisture exposure) on the morphological and mechanical properties of fly ash mixed high-density polyethylene (FA/HDPE) composites with three dissimilar weight fractions (5, 10 and 15 wt%) of filler and compared the results with similarly aged neat HDPE samples. The consequence of environmental ageing on the elevated mechanical properties of composites is investigated. Fifteen wt% fly ash reinforced composite appears to have better morphological and mechanical properties after 20 weeks of ageing, with only ~5 and ~9% reduction in Young's modulus and tensile strength, respectively. The driving factors controlling the ageing effects are broadly discussed and recommendations are made for research advancements.
粉煤灰的副产物丰度使其能够用作高填充量和高性能热塑性复合材料的增强填料。然而，由于在环境老化过程中聚合物降解会产生脆性材料，导致表面出现裂纹，这可能会将有害的粉煤灰颗粒释放到环境中，因此复合材料的耐久性仍然受到质疑。本文报道了环境老化（紫外线和湿气暴露）对含有三种不同重量分数（5%、10%和15%）填料的粉煤灰混合高密度聚乙烯（FA/HDPE）复合材料的形态和力学性能的影响，并将结果与同样老化的纯HDPE样品进行了比较。研究了环境老化对复合材料提高后的力学性能的影响。15%重量分数粉煤灰增强复合材料在老化20周后似乎具有更好的形态和力学性能，杨氏模量和拉伸强度分别仅降低约5%和9%。文中广泛讨论了控制老化效应的驱动因素，并对研究进展提出了建议。
