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The monomer 2,6,12-triaminotriptycene was synthesized and the structure was confirmed by IR and ~1H NMR spectra. Hyperbranched polyimides modified with different terminal groups were obtained from precursors,anhydride-and amino- terminated hyperbranched poly(amic acid)s from polymerization of A_2+B_3 system.From gel permeation chromatogram (GPC)characterization,representative products had high molecular weight.All polymers had good solubility in CHCI_3,DMF and tetrahydrofuran(THF),and performed no detective T_gs in the range of 50-300℃and high T_ds above 455℃when 5% weight loss.
The monomer 2,6,12-triaminotriptycene was synthesized and the structure was confirmed by IR and ~ 1H NMR spectra. Hyperbranched polyimides modified with different terminal groups were obtained from precursors, anhydride-and amino-terminated hyperbranched poly (amic acid) s from polymerization of A_2 + B_3 system. Flash gel permeation chromatogram (GPC) characterization, representative products had high molecular weight. All polymers had good solubility in CHCl_3, DMF and tetrahydrofuran (THF), and performed no detective T_gs in the range of 50-300 ℃ and high T_ds above 455 ℃ when 5% weight loss.