Synthesis and thermo-oxidative degradation of acyclic polyimides

For the first time, film-forming aromatic acyclic polyimides were obtained as a result of in situ rearrangement or as a result of heat treatment of polycarboxyimidates by the Mumm-Hess mechanism. Intermediate polycarboxyimidates were prepared using the acid-catalyzed reaction of dicarboxylic acids a...

Full description

Saved in:
Bibliographic Details
Published in:Polymer (Guilford) 2020-09, Vol.205, p.122692, Article 122692
Main Authors: Ochirov, Boris D., Gorenskaia, Elena N., Kholkhoev, Bato Ch, Ayurova, Oksana Zh, Burdukovskii, Vitalii F.
Format: Article
Language:English
Subjects:
Acyclic polyimide
Dicarboxylic acids
Flynn–wall–ozawa friedman method
Heat treatment
Heat treatments
Ionic liquids
Ions
Polyimide resins
Thermal degradation kinetics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:For the first time, film-forming aromatic acyclic polyimides were obtained as a result of in situ rearrangement or as a result of heat treatment of polycarboxyimidates by the Mumm-Hess mechanism. Intermediate polycarboxyimidates were prepared using the acid-catalyzed reaction of dicarboxylic acids and dinitriles in ionic liquids. The probable mechanism and the corresponding kinetic parameters of thermooxidative decomposition of acyclic polyimides were determined using NetzschThermokinetics 3 – multidimensional nonlinear regression software. [Display omitted] •For the first time APIs were obtained in the super-acidic ionic liquid [1-Bu-3-MeIm]Al2Cl7.•Intermediate PCI can rearrange in situ or by thermolysis.•The thermokinetic parameters of API destruction have been established.•Thermal degradation of API begins with the release of water.•API can be well processed from amide solutions or melts.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2020.122692