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首页> 外文期刊>Journal of Applied Polymer Science >Development and characterization of a novolac resin/BaTiO _3 nanoparticles composite system
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Development and characterization of a novolac resin/BaTiO _3 nanoparticles composite system

机译：线型酚醛树脂/ BaTiO_3纳米粒子复合体系的开发与表征

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摘要

Polymer composites incorporating ferroelectric and piezoelectric crystal particles, randomly distributed within the host matrix, represent a novel class of materials. In this study, composite materials consisted of novolac resin and barium titanate nanoparticles were prepared and examined, varying the nanofiller content. Structural characterization was conducted via X-ray diffraction and scanning electron microscopy. Mechanical and dielectric properties were examined by employing bending and shear strength tests and broadband dielectric spectroscopy, respectively. Bending and shear strength found to decrease with the filler content. Dielectric permittivity was found to increase significantly with filler content, and the detected relaxation processes were attributed to interfacial polarization, glass to rubber transition of the matrix, and reorientation of polar side groups of the polymer chain. Although, the mechanical performance of the examined systems seems not to be attractive in applications due to its brittleness, nanocomposites' dielectric response could be proved interesting in electrical and electronic devices applications.
机译：包含铁电和压电晶体颗粒的聚合物复合材料随机分布在主体基质中，代表了一类新型材料。在这项研究中，制备和检查了由线型酚醛树脂和钛酸钡纳米粒子组成的复合材料，改变了纳米填料的含量。通过X射线衍射和扫描电子显微镜进行结构表征。分别通过弯曲和剪切强度测试和宽带介电谱检查了机械和介电性能。发现弯曲和剪切强度随填料含量降低。发现介电常数随填料含量显着增加，并且检测到的弛豫过程归因于界面极化，基质的玻璃至橡胶的转变以及聚合物链的极性侧基的重新取向。尽管由于其脆性，所检查系统的机械性能似乎在应用中并不吸引人，但纳米复合材料的介电响应可以证明在电气和电子设备应用中很有趣。

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