The mechanical properties of sawdust reinforced vinyl ester resin composites post-cured in microwaves have been measured and evaluated in earlier studies. This basic but critical and important data have caused interests in the relevant industry in Australia. This study is therefore carried out to measure and evaluate the thermal properties of the composites with a view to benefit the civil and construction industry as the materials are used in the industry. The original contributions of this paper are that samples post-cured in microwaves, irrespective of the percentage by weight and particle size of sawdust, have higher glass transition temperatures than their counterparts post-cured in an oven; these imply that the stiffness of the samples post-cured in microwaves are higher than their peers. From previous study, it was discovered that the fracture toughness increased with increasing particulate loading. These properties are vital in civil engineering applications because civil structures need composites with high rigidity and fracture toughness. It is hoped that the discussions and results in this work would not only contribute towards the development of sawdust reinforced vinyl ester composites with better material properties, but also useful for the investigations of thermal and mechanical properties in other composites. udud
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机译:在微波中后固化的木屑增强乙烯基酯树脂复合材料的机械性能已在早期研究中进行了测量和评估。这些基本但至关重要的重要数据引起了澳大利亚相关行业的兴趣。因此,进行该研究以测量和评估复合材料的热性能,以使工业中使用的材料受益于民用和建筑业。本文的原始贡献在于,与在烤箱中进行后固化的样品相比,在微波中进行后固化的样品,无论重量百分比和木屑的大小如何,其玻璃化转变温度都更高。这些暗示在微波中后固化的样品的刚度要高于其他样品。从先前的研究中发现,断裂韧性随着颗粒载荷的增加而增加。这些特性在土木工程应用中至关重要,因为土木结构需要具有高刚度和断裂韧性的复合材料。希望这项工作的讨论和结果不仅有助于开发具有更好材料性能的木屑增强乙烯基酯复合材料,而且对研究其他复合材料的热和机械性能也很有用。 ud ud
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