Journal of Polymer Science Part A: Polymer Chemistry, Vol.38, No.3, 498-503, 2000
Enhancing the glass-transition temperature of polyimide copolymers containing 2,2 '-bipyridine units by the coordination of nickel malenonitriledithiolate
Polyimide copolymers containing 2,2'-bipyridine were synthesized and characterized. The glass-transition temperatures (T-g's) of the polymers ranged from 260 to 300 degrees C. In contrast to most known organic chromophore-containing polyimides, the polyimide copolymers in this study showed elevated T-g's (270-320 degrees C) after coordination with nickel malenonitriledithiolate inorganic chromophores.