Synthesis of a new fluoroalkylated diamine, 5-[1 H,1 H-2-bis(trifluoromethyl)- heptafluoropentyl]-1,3-phenylenediamine, and polyimides prepared therefrom

• Published in: Polymer (Guilford) Vol. 36; no. 3; pp. 651 - 656
• Main Authors: Auman, Brian C., Higley, David P., Scherer, Kirby V., McCord, Elizabeth F., Shaw, William H.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1995; Elsevier
• Subjects: Applied sciences; Exact sciences and technology; fluorinated polyimides; fluoroalkylated diamine; Organic polymers; Physicochemistry of polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; synthesis; synthesis; fluoroalkylated diamine; fluorinated polyimides; Polyimide; Fluorine containing polymer; Dielectric properties; Mechanical properties; Experimental study; Polyaddition; Thermal properties; Diamine; Preparation; Moisture regain; Thermal expansion coefficient; Thermostable; Semiladder polymer
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/0032-3861(95)91576-S

The preparation of a new perfluoroalkylated diamine, 5-[1 H,1 H-2-bis(trifluoromethyl)heptafluoropentyl]-1,3-phenylenediamine, is described. Poly(amic acid)s and polyimides were prepared from this new diamine and polyimides were evaluated as films for electronics applications. The polyimides evaluated were found to yield low dielectric constant and low moisture absorption, but were found to have exceptionally high thermal expansion coefficient. The materials are envisioned to have applications in electronics, where a low and humidity-stable dielectric constant is required.