Structural, Thermal, and Mechanical Characterization of a Thermally Conductive Polymer Composite for Heat Exchanger Applications

Polymers

Logan Kearney¹  Michael Thompson²  Orlando Rios²  Alexis Flores-Betancourt³  Jamieson Brechtl⁴  Yuzhan Li⁴  Kai Li⁴  Ayyoub M. Momen⁴  Kashif Nawaz⁴ 

[1] Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA;Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;Multifunctional Equipment Research Group, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;

关键词: polymer composites;    microstructure analysis;    thermal analysis;    creep modeling;    mechanical properties;   

DOI  :  10.3390/polym13121970

来源: DOAJ

【 摘 要 】

Polymer composites are being considered for numerous thermal applications because of their inherent benefits, such as light weight, corrosion resistance, and reduced cost. In this work, the microstructural, thermal, and mechanical properties of a 3D printed polymer composite with high thermal conductivity are examined using multiple characterization techniques. Infrared spectroscopy and X-ray diffraction reveal that the composite contains a polyphenylene sulfide matrix with graphitic fillers, which is responsible for the high thermal conductivity. Furthermore, differential scanning calorimetry determines that the glass transition and melting point of the composite are 87.6 °C and 285.6 °C, respectively. Thermogravimetric analysis reveals that the composite is thermally stable up to ~400 °C. Creep tests are performed at different isotherms to evaluate the long-term performance of the composite. The creep result indicates that the composite can maintain mechanical integrity when used below its glass transition temperature. Nanoindentation tests reveal that modulus and hardness of the composite is not significantly influenced by heating or creep conditions. These findings indicate that the composite is potentially suitable for heat exchanger applications.

【 授权许可】

Unknown