Effect of imidization process on the performance of PI/nano-Al2O3 three layer composite film
Abstract
Purpose
The purpose of this paper was to comprehensively understand the effects of imidization process on the structure and properties of polyimide (PI) films through the preparation and characterization of a variety of PI/aluminium oxide (Al2O3) nanocomposite films by using several imidization-based strategies.
Design/methodology/approach
Poly(amic acid) (PAA) containing different amounts of inorganic materials (namely, 0 Wt.%, 4 Wt.%, 8 Wt.%, 12 Wt.% and 16 Wt.%) was synthesized by using pyromellitic dianhydride and 4,4-diaminodiphenyl ether as raw material and N,N-dimethylacetamide as solvent. Subsequently, the solution obtained was casted on a glass substrate and dried by the means of various curing processes. The micro-structure, Fourier transform–infrared spectral features, breakdown field strength, dielectric properties and the corona-resistant time parameters of films were achieved.
Findings
The imidization process influences substantially the properties of composite films. Therefore, as the imidization rate is increased, the corona-resistant time and the electrical breakdown strength of composite films are also improved, while the dielectric constant faces a+ decreasing.
Research limitations/implications
In this paper, the impact of imidization process on the performance of PI/nano-Al2O3 three-layered composite film is reported. However, there are multiple factors governing these systems (such as, interlayer thickness ratio and humidity), which are not discussed herein.
Originality/value
The current study expounds the relationship between imidization ratios as well as the effect of imidization ratio on the performance of the film.
Keywords
Acknowledgements
The authors are thankful for the financial support from the National Natural Science Foundation of China (No. 51177030) and the Natural Science Foundation of Heilongjiang Province of China (No. E201224).
Citation
Liu, L., He, H., Weng, L. and Zhang, X. (2017), "Effect of imidization process on the performance of PI/nano-Al2O3 three layer composite film", Pigment & Resin Technology, Vol. 46 No. 4, pp. 327-331. https://doi.org/10.1108/PRT-03-2016-0031
Publisher
:Emerald Publishing Limited
Copyright © 2017, Emerald Publishing Limited