| 导热绝缘h-BN/MVQ/EVA复合材料的双逾渗效应 |
| |
| 引用本文： | 杨文彬,张凯,廖治强,程金旭,谢长琼,吴菊英,范敬辉.导热绝缘h-BN/MVQ/EVA复合材料的双逾渗效应[J].材料导报,2017,31(7):137-142. |
| |
| 作者姓名： | 杨文彬 张凯 廖治强 程金旭 谢长琼 吴菊英 范敬辉 |
| |
| 作者单位： | 1. 西南科技大学材料科学与工程学院,四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地, 绵阳 621010;四川大学高分子材料工程国家重点实验室, 成都 610065;2. 中国工程物理研究院总体工程研究所,绵阳,621010;3. 西南科技大学材料科学与工程学院,四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地, 绵阳 621010 |
| |
| 基金项目： | 国家自然科学基金委员会-中国工程物理研究院联合基金(U1530102)；四川省科技厅应用基础研究项目(2017JY0149)；高分子材料工程国家重点实验室开放课题(sklpme2016-4-33)；核废物与环境安全国防重点学科实验室开放基金(15kffk08) |
| |
| 摘 要： | 将h-BN加入到MVQ和EVA混合物中制备导热绝缘h-BN/MVQ/EVA复合材料,SEM结果表明h-BN选择性分布在EVA,与杨氏方程理论一致.h-BN/MVQ/EVA复合材料中的双逾渗效应,有助于力学性能和导热性能的提升.h-BN/MVQ/EVA复合材料的热导率与h-BN含量和MVQ/EVA比值有关.当EVA质量分数为30%时,h-BN/MVQ/EVA复合材料热导率的相对值最大.h-BN/MVQ/EVA复合材料的拉伸强度和断裂伸长率与EVA含量有关,随着EVA和h-BN含量的增加,复合材料的介电常数降低.
|
| 关 键 词： | 热导率 双逾渗 介电常数 六方氮化硼/MVQ/EVA 绝缘 |
Double Percolation Effect in Thermally Conductive and Electrically Insulating h-BN/MVQ/EVA Ternary Composite |
| |
| YANG Wenbin,ZHANG Kai,LIAO Zhiqiang,CHENG Jinxu,XIE Changqiong,WU Juying and FAN Jinghui.Double Percolation Effect in Thermally Conductive and Electrically Insulating h-BN/MVQ/EVA Ternary Composite[J].Materials Review,2017,31(7):137-142. |
| |
| Authors: | YANG Wenbin ZHANG Kai LIAO Zhiqiang CHENG Jinxu XIE Changqiong WU Juying and FAN Jinghui |
| |
| Affiliation: | State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, School of MaterialsScience and Engineering,Southwest University of Science and Technology, Mianyang 621010;State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065,Institute of System Engineering, China Academy of Engineering Physics, Mianyang 621010,State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, School of MaterialsScience and Engineering,Southwest University of Science and Technology, Mianyang 621010,State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, School of MaterialsScience and Engineering,Southwest University of Science and Technology, Mianyang 621010,State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, School of MaterialsScience and Engineering,Southwest University of Science and Technology, Mianyang 621010,Institute of System Engineering, China Academy of Engineering Physics, Mianyang 621010 and Institute of System Engineering, China Academy of Engineering Physics, Mianyang 621010 |
| |
| Abstract: | Hexagonal boron nitride (h-BN) was added into polymer blends of methyl-vinyl-silicone rubber (MVQ) and ethy-lene-vinyl-acetate copolymer (EVA) to prepare thermally conductive and electrically insulating composites by melt processing me-thod.According to Young's equation, the wettability coefficient points out that the dispersion of h-BN in EVA is thermodynamically more favorable than in MVQ.The result of SEM showed that h-BN was selectively located in EVA.There existed double percolation effect in h-BN/MVQ/EVA ternary composites, which resulted in promoting for both mechanical properties and thermal conductivity.The thermal conductivity of h-BN/MVQ/EVA composites were related with h-BN content and EVA/MVQ ratio.When EVA content was 30 wt% in the matrix blend, the relatively increased rate of thermal conductivity of h-BN/MVQ/EVA composites was the highest.The tensile strength and the elongation at break were mainly related with the EVA content in polymer matrix.The increa-sing amount of EVA and h-BN in the composites resulted in a decrease in dielectric constant. |
| |
| Keywords: | thermal conductivity double percolation dielectric property h-BN/MVQ/EVA electrical insulation |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《材料导报》浏览原始摘要信息 |
|
点击此处可从《材料导报》下载全文 |
|
