Effect of nanosilica on the thermal, mechanical, and dielectric properties of polyarylene ether nitriles terminated with phthalonitrile

Abstract

Nanosilica/polyarylene ether nitriles terminated with phthalonitrile (SiO2/PEN‐t‐Ph) composites were prepared by hot‐press approach. To ensure the nano‐SiO2 can disperse uniformly, the solution casting method combined with ultrasonic dispersion technology had been taken previously. The mass fraction of nano‐SiO2 particles was varied to investigate their effect on the thermal, mechanical, and dielectric properties of the nanocomposites. From scanning electron microscope images, it was found that the nanoSiO2 particles were dispersed uniformly in the PEN‐t‐Ph matrix when the addition of nano‐SiO2 was less than 16.0 wt%. However, when the mass fraction of nano‐SiO2 increased to 20.0 wt%, the nano‐SiO2 particles tend to self‐aggregate and form microns sized particles. Thermal studies revealed that nano‐SiO2 particles did not weaken the thermal stabilities of the PEN‐t‐Ph matrix. Mechanical investigation manifested that the SiO2/PEN‐t‐Ph nanocomposites with 12.0 wt% nano‐SiO2 loading showed the best mechanical performance with tensile strength of 108.2 MPa and tensile modulus of 2107.5 Mpa, increasing by 14% and 19%, respectively as compared with the pure PEN‐t‐Ph film. Dielectric measurement showed that the dielectric constant increased from 3.70 to 4.15 when the nano‐SiO2 particles varied from 0.0 to 20.0 wt% at 1 kHz. Therefore, such composite was a good candidate for high performance materials at elevated temperature environment. POLYM. COMPOS., 35:344–350, 2014. © 2013 Society of Plastics Engineers

Effect of SiO2 grafted MWCNTs on the mechanical and dielectric properties of PEN composite films

“…Therefore, it is a critical issue to modify the surface of MWCNTs and improve interfacial adhesion with polymer matrix [13][14][15]. As previously reported [16,17], the interfacial compatibility between the filler and matrix had been greatly improved by the method of surface functionalization of inorganic nanoparticles [18]. Furthermore, as a kind of excellent structural and functional materials, nanosilica (nano-SiO 2 ) performs superior properties such as small particle diameter, high surface activity, thermostability, nontoxic, nonpolluting, and high mechanical property [19][20][21].…”

High thermal and thermomechanical properties obtained by reinforcing a bisphenol-A based phthalonitrile resin with silicon nitride nanoparticles

“…Over the last few decades, the use of phthalonitrile resins as matrix for composites attracted a lot of attention for example Sastri et al studied the phthalonitrile resins filled with carbon and glass fibers [2,3], also Liu et al investigated the polyarylene ether nitriles terminated phthalonitrile composites [4,5]. To date and best to our knowledge there had been quite no reports indicating the use of silicon nitride (SiN) nanoparticles as reinforcements in phthalonitrile resins.…”

Effects of surface‐functionalized aluminum nitride on thermal, electrical, and mechanical behaviors of polyarylene ether nitrile‐based composites

“…Epoxy‐based composites filled with hexagonal boron nitride and cubic boron nitride as hybrid filler system exhibited higher thermal conductivity than that when blending only with hexagonal boron nitride . Although polyarylene ether nitrile (PEN) possesses excellent mechanical properties and thermal thermo‐oxidative stability, different fillers are also added in PEN matrix for the formation of high‐performance material . In addition, PEN with low thermal conductivity needs to be modified with high thermal conductive fillers to promote its application for heat conduction.…”