Preparation of thermally conductive polycarbonate/boron nitride composites with balanced mechanical properties,Polymer Composites

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Preparation of thermally conductive polycarbonate/boron nitride composites with balanced mechanical properties
Polymer Composites ( IF 4.8 ) Pub Date : 2020-09-09 , DOI: 10.1002/pc.25805
Shengtai Zhou ₁ , You Shi ₁ , Yang Bai ₁ , Mei Liang ₁ , Huawei Zou ₁

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In this study, thermally conductive polycarbonate/boron nitride (PC/BN) composites were prepared by masterbatch dilution and direct melt mixing methods, respectively. A comparative study of both microstructure and rheological properties of corresponding composites suggests an improved filler distribution is achieved by masterbatch dilution, which is advantageous to the enhancement of both thermal conductivity and tensile properties at a medium filler loading range. In addition, thermogravimetric analysis indicated that thermal stability of masterbatch diluted PC/BN composites is superior to that of direct melt compounded counterparts. However, the char residue of PC in subsequent composites decreases with increasing filler content, which is believed to be related to the incompatibility between fillers and the matrix, as well as the enhancement of thermal conductivity. This work provides a facile method to prepare thermally conductive composites with balanced mechanical properties.

中文翻译：

具有平衡机械性能的导热聚碳酸酯/氮化硼复合材料的制备

在这项研究中，分别通过母料稀释和直接熔融混合方法制备了导热聚碳酸酯/氮化硼（PC / BN）复合材料。对相应复合材料的微观结构和流变性能的比较研究表明，通过母料稀释可以改善填料分布，这有利于在中等填料载荷范围内提高导热性和拉伸性能。另外，热重分析表明，母料稀释的PC / BN复合材料的热稳定性优于直接熔融复合材料的热稳定性。但是，随后的复合材料中PC的炭残留量随填料含量的增加而减少，这被认为与填料与基体之间的不相容性有关，以及提高热导率。这项工作为制备具有平衡机械性能的导热复合材料提供了一种简便的方法。

更新日期：2020-09-09

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