联苯芳香酯型液晶环氧树脂制备及性能研究

doi:10.11896/cldb.24070137

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Abstract With the progress of science and technology, electronic devices are developing in the direction of high power, miniaturization and intensive type, and the thermal conductivity of electronic packaging materials is particularly important. Based on the optimized regulation of molecular chain liquid crystal mesogen and topological structure, this study synthesized biphenyl aromatic ester-type liquid crystal compound and epoxy resin composite materials with liquid crystalline properties, and investigated their comprehensive performance. Biphenyl aromatic ester liquid crystal epoxy resin monomer (LCER) was prepared by esterification and epoxidation reaction using 4, 4′-dihydroxy biphenyl and 3, 5-dihydroxybenzoic acid as reaction raw materials. LCER/E-51 composites were prepared under the action of the curing agent methyl hexahydro phthalic anhydride and the accelerator DMP-30, and the molecular structure, liquid crystal properties of LCER and thermal conductivity, mechanical properties and insulation properties of the composites were analyzed. The test results show that the synthesized LCER has liquid crystal performance, and the introduction of LCER can improve the thermal conductivity and mechanical properties of the matrix E-51 if the insulation performance is not decreased. As the LCER content increases, the thermal conductivity of the composite also increases, increasing by 135% when the LCER mass fraction is 20%. The impact strength, bending strength and tensile strength of composite materials all increase first and then decrease with the increase of LCER content. When the LCER content was 12%, the values increased by 72%, 15% and 8% respectively. The volume resistivity and AC breakdown field strength of LCER/E-51 composites were 69.8% and 19.8% respectively.

Key words： epoxy resin liquid crystal structure thermal conductivity mechanical property insulation property cross-linked networks

Published: Online: 2025-08-28

CLC number:

TB332

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	Articles by authors
	SONG Wei
	FAN Jixuan
	LI Lin
	FENG Jingtao
	SONG Wenhong
	PENG Xiufeng
	GOU Mengmeng
	ZHU Lipeng

Cite this article:

SONG Wei,FAN Jixuan,LI Lin, et al. Study on the Preparation and Properties of Biphenyl Liquid Crystal Epoxy Resin[J]. Materials Reports, 2025, 39(17): 24070137-6.

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https://www.mater-rep.com/EN/10.11896/cldb.24070137 OR https://www.mater-rep.com/EN/Y2025/V39/I17/24070137

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