Glass transition and CTE properties of zirconium tungstate-filled bisphenol-A powder composites

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing Pub Date : 2025-05-31 DOI:10.1016/j.polymertesting.2025.108865

Caroline F. Uncles , Kevin Hunt , Shirley Fong , James Mainwaring , Jasmine Bone , Andrew Viquerat

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Abstract

Zirconium tungstate powder was added to three bisphenol-A-based epoxy resins in different loadings up to 1 wt%. Zirconium tungstate (ZrW₂O₈) is known to have a negative coefficient of thermal expansion (CTE), and the effect of the added powder on the composite material's CTE and glass transition temperature (T_g) was assessed using dynamic mechanical analysis (DMA) and thermomechanical analysis (TMA). The T_g of all three resins was observed to decrease with increasing ZrW₂O₈ loading. However, while the CTE in the sub-T_g temperature range was observed to decrease in all three resins with increasing ZrW₂O₈ loading, the CTE at temperatures above T_g was found to increase with increasing ZrW₂O₈ loading. It is thought that this behaviour is caused by an increase in free volume within the polymer since the zirconium tungstate is contracting in size with increasing temperature.

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钨酸锆填充双酚a粉体复合材料的玻璃化转变及CTE性能

在三种双酚基环氧树脂中以不同的添加量添加钨酸锆粉，添加量为1wt %。已知钨酸锆（ZrW2O8）具有负的热膨胀系数（CTE），通过动态力学分析（DMA）和热力学分析（TMA）评估了添加粉末对复合材料CTE和玻璃化转变温度（Tg）的影响。三种树脂的Tg均随ZrW2O8负载的增加而降低。然而，在亚Tg温度范围内，三种树脂的CTE随ZrW2O8负载的增加而降低，而在Tg以上温度范围内，CTE随ZrW2O8负载的增加而增加。人们认为这种行为是由聚合物内自由体积的增加引起的，因为钨酸锆的尺寸随着温度的升高而缩小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymer Testing 工程技术-材料科学：表征与测试

CiteScore

10.70

自引率

5.90%

发文量

328

审稿时长

44 days

期刊介绍： Polymer Testing focuses on the testing, analysis and characterization of polymer materials, including both synthetic and natural or biobased polymers. Novel testing methods and the testing of novel polymeric materials in bulk, solution and dispersion is covered. In addition, we welcome the submission of the testing of polymeric materials for a wide range of applications and industrial products as well as nanoscale characterization. The scope includes but is not limited to the following main topics: Novel testing methods and Chemical analysis • mechanical, thermal, electrical, chemical, imaging, spectroscopy, scattering and rheology Physical properties and behaviour of novel polymer systems • nanoscale properties, morphology, transport properties Degradation and recycling of polymeric materials when combined with novel testing or characterization methods • degradation, biodegradation, ageing and fire retardancy Modelling and Simulation work will be only considered when it is linked to new or previously published experimental results.