Synergistic enhancement of mechanical, crystalline and dielectric properties of polyarylene ether nitrile‐based nanocomposites by unidirectional hot stretching–quenching

Abstract

Copper tetra-amine phthalocyanine (NH 2 -CuPc) was grafted onto barium titanate (BaTiO 3 ) whose surface was modified by carboxylic polyarylene ether nitrile (CPEN) to afford a nano-filler (CPEN-f-BaTiO 3 @NH 2 -CuPc). Through a solution-casting method combined with ultrasonic dispersion technology, the obtained CPEN-f-BaTiO 3 @NH 2 -CuPc was successfully incorporated into biphenyl polyarylene ether nitrile (BP-PEN) matrix to prepare nanocomposite films with various mass fractions of CPEN-f-BaTiO 3 @NH 2 - CuPc (0, 2.0, 5.0, 10.0 and 20.0 wt%). After that, the nanocomposite films were unidirectionally stretched with various stretching ratios at 280 ∘ C. All the nanocomposite films show excellent mechanical and thermal stability, which is provided by the BP-PEN matrix. The crystallinity and mechanical, thermal and dielectric properties of the nanocomposite films are efficiently enhanced after the unidirectional hot-stretching process. The results show that hot-stretching is a useful method for improving the mechanical and crystallization behaviors as well as the thermal and dielectric properties of the nanocomposite films.

Crystallinity of poly(arylene ether nitrile) copolymers containing hydroquinone and bisphenol A segments

“…When the HQ/BPA‐PEN copolymers were dissolved thoroughly, the solution was filtrated and the filtration was slowly cast onto a clean glass plates. Then, the system was dried in an oven at 80 °C (1 h), 100 °C (1 h), 120 °C (1 h), 160 °C (1 h), 200 °C (2 h) in sequence . Finally, the obtained films were cooled down to room temperature naturally.…”

3D-Conformer of Tris[60]fullerenylated cis-Tris(diphenylamino-fluorene) as Photoswitchable Charge-Polarizer on GHz-Responsive Trilayered Core-Shell Dielectric Nanoparticles

“…It can be correlated with electrons shifting within polarizable molecules or the dielectric medium showing electronic polarizability. Certain polymers including poly(vinylidene fluoride) (PVDF, having asymmetrical electron-withdrawing fluorine) [ 1 , 2 ], polyarylene ether nitrile (PEN, having polar cyano groups) with conducting polyaniline [ 3 , 4 ] and azobenzene dyes (having large dipole moments of polar push-pull donor-acceptor terminal groups) [ 5 ] may exhibit such behavior; however, with a low dielectric constant. Advantages of organic dielectrics over inorganic ones, such as barium calcium titanate [ 6 ], boron nitride on graphenes [ 7 ], and titanium dioxide [ 8 ], lay on their facile chemical modification and easy processing, intrinsic excellent mechanical performance, recyclability, and multiple components blending.…”

Polyarylene Ether Nitrile-Based High-k Composites for Dielectric Applications

“…In addition, there is a free rotational -O-(ether bond) in the main chain. Therefore, these characteristics endow the PEN with excellent tensile strength, tensile modulus, chemical stability, and radiation resistance [56]. The performance parameters of the first industrial PEN ID-300 [59] are shown in Table 1.…”

“…Therefore, the high-k material with high thermal stability has aroused the interest of researchers. It is well known that PEN is a high-performance thermoplastic engineering resin owing to the high mechanical behavior, thermal stability, easy processing, radiation resistance, and corrosion resistance [54][55][56][57][58].…”