Effective thermal conductivity and thermal properties of phthalonitrile‐terminated poly(arylene ether nitriles) composites with hybrid functionalized alumina. Issue 10 (28th October 2014)

• Record Type: Journal Article
• Authors: Liu, Mengdie; Jia, Kun; Liu, Xiaobo
• Is Part Of: Journal of applied polymer science. Volume 132:Issue 10(2015:May 15)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2014-10-28
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.41595
• Languages: English
• ISSNs: 0021-8995

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A polymer‐based thermal conductive composite has been developed. It is based on a dispersion of micro‐ and nanosized alumina (Al<sub>2</sub>O<sub>3</sub>) in the phthalonitrile‐terminated poly (arylene ether nitriles) (PEN‐<italic>t</italic>‐ph) via solution casting method. The Al<sub>2</sub>O<sub>3</sub> with different particle sizes were functionalized with phthalocyanine (Pc) which was used as coupling agent to improve the compatibility of Al<sub>2</sub>O<sub>3</sub> and PEN‐<italic>t</italic>‐ph matrix. The content of microsized functionalized Al<sub>2</sub>O<sub>3</sub> (m‐<italic>f</italic>‐Al<sub>2</sub>O<sub>3</sub>) maintained at 30 wt % to form the main thermally conductive path in the composites, and the nanosized functionalized Al<sub>2</sub>O<sub>3</sub> (n‐<italic>f</italic>‐Al<sub>2</sub>O<sub>3</sub>) act as connection role to provide additional channels for the heat flow. The thermal conductivity of the <italic>f</italic>‐Al<sub>2</sub>O<sub>3</sub>/PEN‐<italic>t</italic>‐ph composites were investigated as a function of n‐<italic>f</italic>‐Al<sub>2</sub>O<sub>3</sub> loading. Also, a remarkable improvement of the thermal conductivity from 0.206 to 0.467 W/mK was achieved at 30 wt % n‐<italic>f</italic>‐Al<sub>2</sub>O<sub>3</sub> loading, which is nearly 2.7‐fold higher than that of pure PEN‐<italic>t</italic>‐ph polymer. Furthermore, the mechanical testing reveals that the tensile strength increased from 99 MPa for pure PEN‐<italic>t</italic>‐ph to 105 MPa for composites with 30 wt % m‐<italic>f</italic>‐Al<sub>2</sub>O<sub>3</sub> filler loading. In addition, the PEN‐<italic>t</italic>‐ph composites possess excellent thermal properties with glass transition temperature (<italic>T<sub>g</sub></italic>) above 184°C, and initial degradation temperature (<italic>T</italic><sub>id</sub>) over 490°C. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <bold>2015</bold>, <italic>132</italic>, 41595.</p> </abstract>