Effect of alumina on the structure and properties of polyimide matrix films. (8th August 2016)

• Record Type: Journal Article
• Authors: Cui, X.; Zhu, G.; Liu, W.
• Is Part Of: Plastics, rubber, and composites. Volume 45:Number 7(2016)
• Page Start: 294
• Page End: 299
• Publication Date: 2016-08-08
• Subjects: Polyimide (PI) -- Alumina (Al2O3) -- PI/Al2O3 hybrid films -- KH550 -- Mechanical properties -- Dielectric properties; Plastics -- Periodicals; Rubber -- Periodicals; Polymeric composites -- Periodicals; Polymer engineering -- Periodicals; 668.9
• DOI: 10.1080/14658011.2016.1194600
• Languages: English
• ISSNs: 1465-8011

Abstract

Abstract : To improve the properties of polyimide (PI), different mass fractions of alumina (Al2 O3 ) nanoparticles, unmodified or modified by KH550, were incorporated into PI matrix to form PI/Al2 O3 hybrid films by in situ polymerisation. The effects of Al2 O3 additives on the structure, dielectric and mechanical properties of the films were studied. Fourier transform infrared spectroscopy confirmed the successful preparation of PI/Al2 O3 hybrid films, and the microstructures of the samples showed a more uniform dispersion of the modified Al2 O3 nanoparticles than the unmodified ones in the matrix. The dielectric constant of the films increased with increasing filler content, and the maximum electrical breakdown strength of 311 MV m −1 was obtained with a filler content of 8.0 wt-% modified Al2 O3 in the matrix. Both unmodified and modified Al2 O3 -reinforced PI hybrids demonstrated improved mechanical properties compared with the PI matrix. Moreover, the properties of films with Al2 O3 modified by KH550 were better.