Preparation of Polyimide Films Derived from a Novel Precursor Pre-imidized Poly (amic acid) Ammonium Salt

DOI

10.2991/icmsa-15.2015.82How to use a DOI?

Keywords

Poly (amic acid) Ammonium Salt, Pre-imidization, Hydrolytic Stability, Chemical Structure, Property.

Abstract

In this paper, a series of polyimide films were prepares through a novel precursor pre-imidized poly (amic acid) ammonium salt (PI-PAAS). The chemical structure of PI-PAAS films was confirmed by 1H NMR, and the degree of pre-imidization was confirmed by FT-IR spectra. And the intrinsic viscosity of the PI-PAAS solution was not distinctly changed after 90 days, while the viscosity of poly (amic acid) (PAA) obviously decreased with storage time. It was suggested that hydrolytic stability of PI-PAAS was significantly improved as compared with that of PAA due to the shielded carboxyl groups on PI-PAAS, which prevented the molecular chain of the polymer from decomposition. Moreover, PI films derived from PI-PAAS precursors possessed superior mechanical properties.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Liu-Cheng He
AU  - Bai-Qing Tang
AU  - Li-Xing Dai
PY  - 2014/06
DA  - 2014/06
TI  - Preparation of Polyimide Films Derived from a Novel Precursor Pre-imidized Poly (amic acid) Ammonium Salt
BT  - Proceedings of the 2015 International Conference on Material Science and Applications
PB  - Atlantis Press
SP  - 454
EP  - 459
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.82
DO  - 10.2991/icmsa-15.2015.82
ID  - He2014/06
ER  -