Effect of ZrB2 nanopellets on microstructure, dielectric, mechanical and thermal stability of polyimide

doi:10.1177/0954008321994175

IHEP OpenIR > 北京同步辐射装置

	Effect of ZrB2 nanopellets on microstructure, dielectric, mechanical and thermal stability of polyimide
	BSRF用户
	2021
发表期刊	HIGH PERFORMANCE POLYMERS (IF:1.179[JCR-2016],1.232[5-Year])
ISSN	0954-0083
EISSN	1361-6412
卷号	33 期号:7 页码:797-805
条目编号	BSRF00373
文章类型	Article
摘要	Zirconium boride (ZrB2) with high electrical, thermal conductivity, chemical stability and low coefficient of thermal expansion has been considered promising boride ceramic. In this study, the new type polyimide(PI)-based composites filled with ZrB2 nanopellets were prepared via in-situ polymerization. The results show that the ZrB2 nanopellets are dispersed uniformly in the PI matrix and the ZrB2/PI composites with 0.5 wt.% loading exhibits outstanding dielectric, mechanical properties and thermal stability. A mechanism related to the microstructure is proposed to explain the performance improvement. ZrB2 with strong electron affinity could trigger charges to accumulate on its surface, which promotes the interface polarization and consequently enhance dielectric constant. The strong interactions between ZrB2 and PI beneficial to stress effectively transfer from the PI matrix to the ZrB2. The dense structure of the composites and the intrinsically high thermal conductivity of ZrB2 are conducive to heat transfer in the matrix and reduce heat accumulation. The dielectric constant, tensile strength and elongation at break of the composites are increased by 17.5%, 63% and 59.4% compared to pure PI. Meanwhile, the ZrB2/PI composites possess superior electrical insulation property. The comprehensive performance improvement of the composites share a broader prospect for its application in engineering.
DOI	10.1177/0954008321994175
收录类别	SCI
语种	英语
WOS研究方向	Polymer Science
WOS类目	Polymer Science
WOS记录号	WOS:000638302200001
线站	1W2A
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/293141
专题	北京同步辐射装置
推荐引用方式 GB/T 7714	BSRF用户. Effect of ZrB2 nanopellets on microstructure, dielectric, mechanical and thermal stability of polyimide[J]. HIGH PERFORMANCE POLYMERS,2021,33(7):797-805.
APA	BSRF用户.(2021).Effect of ZrB2 nanopellets on microstructure, dielectric, mechanical and thermal stability of polyimide.HIGH PERFORMANCE POLYMERS,33(7),797-805.
MLA	BSRF用户."Effect of ZrB2 nanopellets on microstructure, dielectric, mechanical and thermal stability of polyimide".HIGH PERFORMANCE POLYMERS 33.7(2021):797-805.