中国塑料

中国塑料 ›› 2013, Vol. 27 ›› Issue (02): 51-55 .DOI: 10.19491/j.issn.1001-9278.2013.02.010

• 材料与性能 • 上一篇    下一篇

Al2O3填充聚酰亚胺改性环氧树脂/玻璃纤维导热复合材料的制备与性能研究

谢璠 齐暑华 李珺鹏   

  1. 西北工业大学 西北工业大学 西北工业大学
  • 收稿日期:2012-09-17 修回日期:2012-11-09 出版日期:2013-02-26 发布日期:2013-02-26

Study on Preparation and Property of Polyimide Modified Epoxy Resins/Glass Fiber Thermally Conductive Composite Filled with Al2O3 Particles

Ivan   

  • Received:2012-09-17 Revised:2012-11-09 Online:2013-02-26 Published:2013-02-26
  • Contact: Ivan

摘要： 以硅烷偶联剂改性的氧化铝为导热填料，聚酰亚胺改性环氧树脂为基体，通过高温模压法制备了Al2O3填充聚酰亚胺/环氧导热玻纤复合材料，研究Al2O3和聚酰亚胺含量对复合材料热性能、力学性能和介电性能的影响。结果表明，复合材料的热导率随着纳米Al2O3粒子含量的增加而增加。当Al2O3粒子的填充量为50 %时，复合材料的热导率可达1.239 W/（m·K）。复合材料冲击强度和弯曲强度随粒子含量的增加呈先增加后降低趋势，当Al2O3粒子的填充量为20 %时，材料的冲击强度为376.3 kJ/m2，弯曲强度为912.6 MPa。聚酰亚胺改性的复合材料具有较好的介电性能、热稳定性和耐热老化性。

关键词: 环氧树脂, 聚酰亚胺, 氧化铝, 玻纤增强, 导热率

Abstract: Thermally conductive composite reinforced by glass fiber was prepared by heatpress molding, using polyimide modified epoxy resin as a matrix, alumina modified by KH550 as thermal conductive filler. The thermal, mechanical, and dielectric properties were studied. It showed that thermal conductivity of the composites increased with increasing content of Al2O3. When the content of Al2O3 reached 50 %, the thermal conductivity was up to 1.239 W/（m·K）. The impact and bend strengths increased first then decreased. When the content of Al2O3 was 20 %，the ultimate values were 376.3 kJ/m2 and 912.6 MPa, respectively. The composites modified using polyimide possessed good dielectric properties, thermal stability, and thermal aging resistant.

Key words: epoxy resin, polyimide, alumina, glass fiber reinforcement, thermal conductivity

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