Structure and properties for conterminously linked polymer of copoly(amic acid) with triallyl isocyanurate and bismaleimide

摘要: The copoly(amic acid)s were prepared from two various diamines 2,2′-bis (4-aminophenoxy phenyl) hexafluoropropane or propane and amine-terminated oligosiloxane, respectively, with aromatic tetracarboxylic dianhydride (3,3′,4,4′-benzophenone dianhydride). resulted acid) mole ratio of triallyl isocyanurate (TAIC)/4,4′-bismaleimidophenylmethane (BMI) subsequently thermally imidized to the corresponding copolyimides. These polymers characterized using viscometer, differential scanning calorimetry, thermogravimetric analyses, dynamic mechanical analysis (DMA), dielectric analyzer, electron microscope. constant (DK) dissipation factor (Df) copolyimides TAIC/BMI much lower than that without TAIC/BMI. Furthermore, formation also would enhance their thermal stability solubility. DMA copolymers showed only a glass transition temperature (Tg), indicating random structure an amorphous state. morphology revealed no phase separation. This indicates homogeneous state has been achieved in this coreaction system. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008