Effect of nanosilica on the thermal, mechanical, and dielectric properties of polyarylene ether nitriles terminated with phthalonitrile. Issue 2 (25th September 2013)

• Record Type: Journal Article
• Authors: Tong, Lifen; Pu, Zejun; Chen, Zhiran; Huang, Xu; Liu, Xiaobo
• Is Part Of: Polymer composites. Volume 35:Issue 2(2014:Feb.)
• Page Start: 344
• Page End: 350
• Publication Date: 2013-09-25
• Subjects: Polymeric composites -- Periodicals; 620.192
• DOI: 10.1002/pc.22667
• Languages: English
• ISSNs: 0272-8397

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Nanosilica/polyarylene ether nitriles terminated with phthalonitrile (SiO<sub>2</sub>/PEN‐<italic>t</italic>‐Ph) composites were prepared by hot‐press approach. To ensure the nano‐SiO<sub>2</sub> can disperse uniformly, the solution casting method combined with ultrasonic dispersion technology had been taken previously. The mass fraction of nano‐SiO<sub>2</sub> 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 nanoSiO<sub>2</sub> particles were dispersed uniformly in the PEN‐<italic>t</italic>‐Ph matrix when the addition of nano‐SiO<sub>2</sub> was less than 16.0 wt%. However, when the mass fraction of nano‐SiO<sub>2</sub> increased to 20.0 wt%, the nano‐SiO<sub>2</sub> particles tend to self‐aggregate and form microns sized particles. Thermal studies revealed that nano‐SiO<sub>2</sub> particles did not weaken the thermal stabilities of the PEN‐<italic>t</italic>‐Ph matrix. Mechanical investigation manifested that the SiO<sub>2</sub>/PEN‐<italic>t</italic>‐Ph nanocomposites with 12.0 wt% nano‐SiO<sub>2</sub> 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‐<italic>t</italic>‐Ph film. Dielectric measurement showed that the dielectric constant increased from 3.70 to 4.15 when the nano‐SiO<sub>2</sub> 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</p> </abstract>