Thiophene-based poly(arylene ether)s: 5. Imide-arylene ether statistical copolymers

• Published in: Polymer (Guilford) Vol. 35; no. 17; pp. 3782 - 3785
• Main Authors: Sheares, V.V., DeSimone, J.M., Hedrick, J.L., Carter, K.R., Labadie, J.W.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.1994
• Subjects: imide-arylene ether copolymers; synthesis; thiophene-based polymers; synthesis; thiophene-based polymers; imide-arylene ether copolymers
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/0032-3861(94)90562-2

Imide-aryl ether thiophene copolymers were prepared and their thermal and mechanical properties were investigated. A key feature of these copolymers is the incorporation of the 2,5-thiophene moiety using 5,5′-bis[(3-aminophenoxy)thienyl-2] Ketone or 5,5′-bis[(4-aminophenoxy)thienyl-2] ketone as diamines in polyimide syntheses. The preparation of these thiophene diamines involved the nucleophilic aromatic substitution of bis(5-chlorothienyl-2) ketone with either 3- or 4-aminophenol in N-methyl-2-pyrrolidinone using potassium carbonate. These diamines were reacted with various compositions of pyromellitic dianhydride and 4,4′-oxydianiline to synthesize the desired poly(amic acid)s. Films were cast and cured (300°C) to effect the imide formation, and the resulting films showed tough ductile mechanical properties with high glass transition temperatures that decreased with increasing thiophene diamine content.