Stability study of sulfonated phthalic and naphthalenic polyimide structures in aqueous medium

• Published in: Polymer (Guilford) Vol. 42; no. 12; pp. 5097 - 5105
• Main Authors: Genies, C, Mercier, R, Sillion, B, Petiaud, R, Cornet, N, Gebel, G, Pineri, M
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-06-2001; Elsevier
• Subjects: Applied sciences; Chemical Sciences; Exact sciences and technology; Hydrolysis stability; Model compounds; Organic polymers; Phthalic Naphthalenic model compounds; Physicochemistry of polymers; Polymers; Sulfonated polyimides; Hydrolysis stability; Sulfonated polyimides; Phthalic Naphthalenic model compounds; Hydrolysis; Polyelectrolyte; Polyimide; Imide; Hydrolysis resistance; Sulfonate polymer; Model compound; Aromatic polymer; Reaction mechanism; Chemical degradation; Experimental study; phthalic naphthalenic model compounds; sulfonated polyimides; hydrolysis stability
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/S0032-3861(00)00645-5

The purpose of this paper is to evaluate the respective hydrolysis stability of phthalic and naphthalenic imide structures through the study of model compounds. The NMR and IR spectroscopic analyses of model compounds, before and after aging in water, at temperature representative of fuel cell working temperature, indicated structural modifications according to imide ring structure. The phthalic model stability was inferior to 1
h at 80°C whereas the confirmed naphthalenic model one was superior to 100
h in the same conditions. Moreover, a limited hydrolysis of naphthalenic imide cycle was also shown.