材料科学
环氧树脂
复合材料
热稳定性
复合数
氮化硼
热导率
电介质
玻璃化转变
天然橡胶
丁腈橡胶
聚合物
化学工程
光电子学
工程类
作者
Xingming Bian,Rui Tuo,Wei Yang,Yiran Zhang,Qing Xie,Jun‐Wei Zha,Jun Lin,Shaojian He
出处
期刊:Polymers
[MDPI AG]
日期:2019-09-23
卷期号:11 (10): 1548-1548
被引量:42
标识
DOI:10.3390/polym11101548
摘要
Filled high thermal conductivity epoxy composite solves the problem of the low thermal conductivity of the epoxy resin itself, but the addition of the thermal conductive filler reduces the mechanical properties of the composite, which limits its application in the field of high voltage insulation. In this work, carboxyl-terminated butadiene nitrile liquid rubber (CTBN) was used to toughen the boron nitride-epoxy hybrid system, and the effects of different contents of CTBN on the mechanical properties, thermal conductivity, glass transition temperature, thermal stability, and dielectric properties of the composites were investigated. The results showed that when the content of CTBN was 5-15 wt.%, the CTBN formed a dispersed island structure in the epoxy resin matrix. The toughness of the composite increased by about 32%, the breakdown strength was improved, and the thermal conductivity was about 160% higher than that of pure epoxy resin. As the CTBN content increased, the glass transition temperature and thermal stability of the composite decreased and the dielectric constant and the dielectric loss increased. When the CTBN content is 10-15 wt.%, a toughened epoxy composite material with better comprehensive properties is obtained.
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