Effective thermal conductivity and thermal properties of phthalonitrile‐terminated poly(arylene ether nitriles) composites with hybrid functionalized alumina

Abstract

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

Learning from Natural Nacre: Constructing Layered Polymer Composites with High Thermal Conductivity

“…Obviously, our Al 2 O 3 –AgNP/epoxy composites exhibit a higher thermal conductivity. For example, the combination of microsized and nanosized Al 2 O 3 particles with an appropriate ratio modestly enhanced the thermal conductivity of the polymer (0.467 W m –1 K –1 ) probably due to the poor interactions between the microsized and nanosized Al 2 O 3 platelets. To minimize the thermal contact resistance, Jiang et al used α-Al 2 O 3 and BN nanosheets as fillers to increase the thermal conductivity of the composites .…”

Enhancing the dielectric properties of poly (arylene ether nitrile) by introducing co-modified BaTiO3

“…Recently, incorporating nanofillers with high dielectric permittivity into PEN becomes a facile and effective way to enhance the dielectric constant to a satisfying degree [5,6]. With various high dielectric nanofillers investigated, a typical dielectric ceramic called barium titanate (BaTiO 3 ) was regarded as the promising candidate to reinforce the dielectric properties of PEN, contributing to its excellent dielectric permittivity and dielectric loss angle with high temperature endurance [7].…”

Preparation and properties of thermally conductive PLA/PA 610 biomass composites

“…Therefore, the thermally conductive fillers, either organic or inorganic, are required to be incorporated into the polymer matrix to produce advanced polymer composites with high thermal conductive (TC) characteristic. In the literature, there were several investigated composite systems including different kinds of fillers, such as aluminum oxide (Al 2 O 3 ), boron oxide (B 2 O 3 ), aluminum nitride (AlN), boron nitride (BN), and silicon carbide (SiC) [1][2][3][4][5] as well as various polymer matrixes, such as polyamide, polyester, polystyrene (PS), and polyvinylidene fluoride. [6][7][8][9] .…”