导热聚氨酯灌封胶的制备与性能研究

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (2): 101-105.

导热聚氨酯灌封胶的制备与性能研究

张博文, 梅启林^*, 黄延楷, 谢超

武汉理工大学材料科学与工程学院,武汉430070

收稿日期:2019-04-15 出版日期:2020-02-28 发布日期:2020-02-28
通讯作者: 梅启林(1970-),男,教授,主要从事树脂基复合材料方面的研究,meiqilin@whut.edu.cn。
作者简介:张博文(1992-),男,硕士研究生,主要从事树脂基复合材料方面的研究。

PREPARATION AND STUDY ON PROPERTIES OF THERMALCONDUCTIVE POLYURETHANE POURING SEALANT

ZHANG Bo-wen, MEI Qi-lin^*, HUANG Yan-kai, XIE Chao

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

Received:2019-04-15 Online:2020-02-28 Published:2020-02-28

摘要/Abstract

摘要： 采用聚四氢呋喃二醇(PTMG)、二苯基甲烷二异氰酸酯(MDI)以及球形氧化铝以一步法制备了聚氨酯灌封胶。研究了偶联剂用量、氧化铝粒径及填充量等对聚氨酯灌封胶导热性能的影响。通过正交实验设计确定影响灌封胶导热性能的最关键因素为Al₂O₃填充量。聚氨酯灌封胶的导热性能在偶联剂的加入后得到有效改善。加入相同含量的Al₂O₃时,2 μm Al₂O₃填充的灌封胶导热性能较好,同种粒径下,灌封胶导热系数随Al₂O₃的加入逐渐升高。灌封胶体积电阻率随Al₂O₃填充量的增加逐渐降低,但灌封胶的绝缘性能仍能满足电子设备封装要求。

关键词: 聚氨酯灌封胶, 导热性能, 氧化铝

Abstract: In this paper, polyurethane pouring sealant was prepared by one-step method using polytetrahydrofuran glycol (PTMG), diphenylmethane diisocyanate (MDI) and spherical alumina. The effects of coupling agent dosage, alumina particle size and filling amount on the properties of polyurethane pouring sealant were studied. The filling amount of Al₂O₃ was determined to be the key factor affecting the thermal conductivity of the pouring sealant by orthogonal experimental design. The thermal conductivity of polyurethane pouring sealant was effectively improved by adding coupling agent. When the same content of Al₂O₃ is added, the thermal conductivity of the pouring sealant filled with 2 μm Al₂O₃ is better. At the same particle size, the thermal conductivity of the pouring sealant increases gradually with the addition of Al₂O₃. The volume resistivity of the pouring sealant decreases with the increase of Al₂O₃ filling, but its insulation performance can still meet the requirements of electronic equipment encapsulation.

Key words: polyurethane pouring sealant, thermal conductivity, alumina

中图分类号:

TB332

张博文, 梅启林, 黄延楷, 谢超. 导热聚氨酯灌封胶的制备与性能研究[J]. 复合材料科学与工程, 2020, 0(2): 101-105.

ZHANG Bo-wen, MEI Qi-lin, HUANG Yan-kai, XIE Chao. PREPARATION AND STUDY ON PROPERTIES OF THERMALCONDUCTIVE POLYURETHANE POURING SEALANT[J]. Composites Science and Engineering, 2020, 0(2): 101-105.

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