Preparation of Polyimide Films Derived from a Novel Precursor Pre-imidized Poly (amic acid) Ammonium Salt
Liu-Cheng He, Bai-Qing Tang, Li-Xing Dai
Available Online June 2014.
- https://doi.org/10.2991/icmsa-15.2015.82How to use a DOI?
- Poly (amic acid) Ammonium Salt, Pre-imidization, Hydrolytic Stability, Chemical Structure, Property.
- 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.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
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 - 2015 International Conference on Material Science and Applications (icmsa-15) PB - Atlantis Press SP - 454 EP - 459 SN - 2352-541X UR - https://doi.org/10.2991/icmsa-15.2015.82 DO - https://doi.org/10.2991/icmsa-15.2015.82 ID - He2014/06 ER -