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Environmentally stable conductive polymers from bis(ethynylstyryl) benzene monomers
Author(s) -
Walton Theodore R.,
Gratz Roy F.
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070440303
Subject(s) - materials science , monomer , polymer , polymerization , inert gas , chemical engineering , polymer chemistry , thermal stability , benzene , conductivity , solvent , organic chemistry , composite material , chemistry , engineering
Several completely conjugated, all‐carbon–hydrogen acetylene‐terminated monomers, bis(ethynylstyryl)benzenes, were synthesized using the Wittig reaction with ethynyl‐benzaldehyde and xylyldiphosphonium salts. These prepolymers were thermally polymerized in the melt phase into thermally stable materials that can be further processed into conductive polymers having high stability to aggressive environments. Conductivity can range from that of an insulator to 10 +2 s/cm. The room temperature conductivity is unchanged by extended exposure to boiling water or 500°C in an inert atmosphere. With proper design of the monomers' structures, they will melt sufficiently below the polymerization temperature to provide an adequate time in the liquid state for ease of processing. Once cured into the solid form, the materials are intractable and exhibit high stability to aggressive environments.