Abstract The influence of tungsten oxide on thermal and mechanical properties of Isophthalic polyester was studied in detail. Ultrasonication technique was successful in dispersing WO3 filler particles upto 40 wt% into the polymer matrix and was confirmed through the Scanning Electron Microscopy technique. The mechanical strength of the composites was found to increase with increase in the WO3 content and is acting as a reinforcer. About 77.4%, 65.4% and 7–8 times increase was observed in tensile, flexural and compressive strength respectively with respect to pristine. The thermogram of the composites reveal two stages of degradation. Maximum weight loss was observed in the first stage of degradation in almost all the composites. The initial degradation temperature of the composites range from 151 °C–226 °C. Activation energy was estimated using Horowitz–Metzger kinetic theory and was found to range from 25.31 to 78.58 kJ/Mol. The 50 wt% WO3 filled composite exhibits excellent thermal stability and mechanical strength. Thus, WO3 filler particles were successful in enhancing the thermal and mechanical strength of Isophthalic polyester.

中文翻译：

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氧化钨填充聚合物复合辐射屏蔽的热阻和机械稳定性

摘要 详细研究了氧化钨对间苯二甲酸聚酯热力学性能的影响。超声波技术成功地将 WO3 填料颗粒分散到聚合物基质中，重量百分比高达 40%，并通过扫描电子显微镜技术得到证实。发现复合材料的机械强度随着 WO3 含量的增加而增加，并起到增强剂的作用。与原始相比，拉伸、弯曲和压缩强度分别增加了约 77.4%、65.4% 和 7-8 倍。复合材料的热分析图显示了两个降解阶段。几乎所有复合材料在降解的第一阶段都观察到了最大的重量损失。复合材料的初始降解温度范围为 151°C-226°C。使用 Horowitz-Metzger 动力学理论估计活化能，发现其范围为 25.31 至 78.58 kJ/Mol。50 wt% WO3 填充的复合材料表现出优异的热稳定性和机械强度。因此，WO3 填料颗粒成功地提高了间苯二甲酸聚酯的热强度和机械强度。