Study on the Preparation and Properties of Biphenyl Liquid Crystal Epoxy Resin
SONG Wei1,2,*, FAN Jixuan1,2, LI Lin3, FENG Jingtao4, SONG Wenhong1,2, PENG Xiufeng1,2, GOU Mengmeng1,2, ZHU Lipeng1,2
1 School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150086, China 2 Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150086, China 3 State Grid Heilongjiang Electric Power Company Electric Power Research Institute, Harbin 150040, China 4 Shanghai Baigao Maidao Technology Co., Ltd., Shanghai 201400, China
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.
1 Wan Y J, Li G, Yao Y M, et al. Composites Communications, 2020, 19, 154. 2 Na T, Che S, Sun Y, et al. Journal of Applied Polymer Science, 2019, 136(7), 47078. 3 Wang W, Zhou W Y, Cao D, et al. Acta Materiae Compositae Sinica, 2022, 39(5), 2060(in Chinese). 王蕴, 周文英, 曹丹, 等. 复合材料学报, 2022, 39(5), 2060. 4 Youngsu K, Jin J, Hyeonuk Y, et al. Composites Research, 2017, 30(1), 1. 5 Zhong X, Meng X D, Zhang R H, et al. Acta Materiae Compositae Sinica, 2019, 36(11), 2644(in Chinese) 钟洨, 孟旭东, 张睿涵, 等. 复合材料学报, 2019, 36(11), 2644. 6 Fu Y X, He Z X, Mo D C, et al. Applied Thermal Engineering, 2014, 66(1-2), 493. 7 Jeong I, Kim B C, Kang D, et al. Journal of Polymer Science, Part A. Polymer Chemistry, 2019, 57(6), 708. 8 Zheng X, Liu R H, Chu D S, et al. Modern Chemical Research, 2022(24), 73(in Chinese). 郑欣, 刘荣海, 初德胜, 等. 当代化工研究, 2022(24), 73. 9 Chen M H, Meng H Y, Li Y, et al. Proceedings of the CSEE, 2023, 43(17), 6895(in Chinese). 陈明华, 孟宏远, 李誉, 等. 中国电机工程学报, 2023, 43(17), 6895. 10 Chai H, Wang X, Yang X, et al. Polymers for Advanced Technologies, 2022, 33(1), 380. 11 Windberger M S, Dimitriou E, Rendl S, et al. Polymers, 2020, 13(1), 65. 12 Kisiel M, Mossety-Leszczak B. European Polymer Journal, 2020, 124, 109507. . 13 Zhang X C. Synthesisi, preparation and propertiesof two biphenyl liquid crystal epoxy resins. Master's Thesis, Beijing University of Chemical Technology, China, 2022(in Chinese). 张新超. 联苯基液晶环氧树脂的制备及其性能研究. 硕士学位论文, 北京化工大学, 2022. 14 Kondic L, Cummings L J. Current Opinion in Colloid & Interface Science, 2021, 55, 101478. 15 Pan H M, Dong Q F, Yang L F, et al. Paint & Coatings Industry, 2024, 54(6), 82(in Chinese). 潘红梅, 董群锋, 杨立峰, 等. 涂料工业, 2024, 54(6), 82. 16 Chen H, Huang Z W, Zhao W, et al. Acta Materiae Compositae Sinica, 2024, 41(5), 2477(in Chinese). 陈昊, 黄紫微, 赵伟, 等. 复合材料学报, 2024, 41(5), 2477. 17 Miguel C, Heino F, Peter P, et al. Nature Materials, 2004, 3(5), 307. 18 Wang H X. Construction method of boron nitride orientation heat conduction network in diphenyl liquid crystal modified epoxy resin. Master's Thesis, Chongqing University, China, 2020(in Chinese). 汪瀚湘. 联苯型液晶改性环氧树脂中氮化硼取向导热网络构建方法. 硕士学位论文, 重庆大学, 2020. 19 Yang X T, Zhong X, Zhang J, et al. Journa of Materials Science & Technology, 2021, 68, 209. 20 Zhu L W, Li J D, Liu J X, et al. New Chemical Materials, 2022, 50(12), 6(in Chinese). 祖立武, 李纪东, 刘嘉欣, 等. 化工新型材料, 2022, 50(12), 6. 21 Ruan K, Zhong X, Shi X, et al. Materials Today Physics, 2021, 20, 100456. 22 Yu Z H, Han Y. China Rubber/Plastics Technology and Equipment, 2024, 50(3), 36(in Chinese). 于智鸿, 韩悦. 橡塑技术与装备, 2024, 50(3), 36. 23 Chen W, Yu Y, Gu Y, et a. Composites Part A:Applied Science and Manufacturing, 2022, 154, 106783. 24 Akatsuka M, Takezawa Y. Journal of Applied Polymer Science, 2010, 89(9), 2464. 25 Harada M, Morioka D, Ochi M. Journal of Applied Polymer Science, 2018, 135(16), 46181. 26 Liu X J, Rao Z. Computational Materials Science, 2020, 172, 109298. 27 Gantenbein S, Masania K, Woigk W, et al. Nature, 2018, 561(7722), 226.
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2025, Vol. 39 
