4.7 Article

Concurrent enhancement of dimensional stability and thermal conductivity of thermoplastic polyamide 12T/Boron nitride composites by constructing oriented structure

期刊

COMPOSITES COMMUNICATIONS
卷 33, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2022.101193

关键词

Polyamide; Boron nitride; Thermal conductivity; Numerical simulation

资金

  1. China Postdoctoral Science Foundation [2020M682317]
  2. Henan Postdoctoral Foundation [202002018]
  3. Opening Project of State Key Laboratory of Polymer Materials Engineering (Sichuan University) [sklpme2021-05-10]
  4. Key Scientific Research Projects of Colleges and Universities in Henan Province [22A430037]
  5. National Key Research and Development Program of China [2017YFB0307600]
  6. Major science and technology projects of Henan Province [181100211200]
  7. National Natural Science Foundation of China [22105179]

向作者/读者索取更多资源

This study utilized high temperature resistant PA12T as matrix to fabricate PA12T/BN composites with excellent thermal management property, observing that the composite showed high in-plane thermal conductivity and low thermal expansion coefficient. Finite element analysis was used to reveal the thermal expansion behavior and mechanism of the composite with oriented filler structure.
Excellent thermal management property and high-temperature dimensional stability are very important for the materials applied in the electronic devices. In this study, high temperature resistant PA12T was applied as the matrix, and PA12T/BN composites with oriented structure were fabricated by the injection molding method. Morphology, thermal conductivity, thermal expansion property and mechanical properties of the composite were systematically investigated. Results demonstrate that when the content of BN is 40 wt%, the in-plane thermal conductivity and thermal expansion coefficient of the composites are 6.5 W/(m.K) and 36 ppm/degrees C, respectively, which are 4 times higher and 80% lower than those along the through-plane direction. Meanwhile, the thermal expansion behavior and mechanism of the composite with oriented filler structure are well revealed by finite element analysis, and the simulated results will provide important guidance for the design and application of the composite. Furthermore, by using the PA12T/BN composite with oriented structure as the substrate of printed circuit board, temperature gradient as well as thermal stress inside the device can be well controlled. Therefore, the PA12T/BN composite has great potential in the application as the substrate or packaging materials of electronic devices.

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