A novel diamine 2H (4 aminophenyl) 4 (3 phenyl 4 aminophenoxy) 2,3 phthalazin 1 one(1) containing N—C coupling bond was synthesized and reacted with four aryl diimide dicarboxylic acids to prepare a series of new aro...A novel diamine 2H (4 aminophenyl) 4 (3 phenyl 4 aminophenoxy) 2,3 phthalazin 1 one(1) containing N—C coupling bond was synthesized and reacted with four aryl diimide dicarboxylic acids to prepare a series of new aromatic poly(amide imide)s via direct polycondensation using Yamazaki phosphorylation procedure.The polymers obtained in high yield had high molecular weight with the inherent viscosity in the range of 0 50～0 70 dLg -1 .Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) indicated that the polymers had high glass transition temperature of 317～343℃ and good thermostability with 10% weight loss temperature above 440℃.They were readily soluble in polar solvents such as NMP、DMF and m cresol etc and clear,tough,flexible films can be cast from their DMAc solutions.The structure of monomer and their polymers was characterized by MS、FT IR and 1H NMR and they are consistant with the proposed structure.X ray diffraction showed that all poly(amide imide)s were amorphous.展开更多
Two aromatic polyimides were prepared by two- step way. Firstly, the poly（amic acid）s were synthesized from 1, 3 - bis（4 - aminophenoxy）benzene and two different aromatic dianhydrides. Secondly, polyimides were pr...Two aromatic polyimides were prepared by two- step way. Firstly, the poly（amic acid）s were synthesized from 1, 3 - bis（4 - aminophenoxy）benzene and two different aromatic dianhydrides. Secondly, polyimides were prepared via thermal imidization of poly（amic acid） precursors. The polyimides prepared were insoluble in common organic solvents such as tetrahydrofuran, chloroform and N, N- dimethyiformamide. The inherent viscosities of poly（amic acid）s were 1.82 dL/g and 2.67 dL/g. The high inherent viscosities were due to the strong intra- or intermolecular hydrogen interaction. The polyimides were characterized by mechanical and thermal analysis. It was found that the samples are of excellent thermal stability, higher glass-transition temperature and excellent dynamic mechanical and thermal properties.展开更多
文摘A novel diamine 2H (4 aminophenyl) 4 (3 phenyl 4 aminophenoxy) 2,3 phthalazin 1 one(1) containing N—C coupling bond was synthesized and reacted with four aryl diimide dicarboxylic acids to prepare a series of new aromatic poly(amide imide)s via direct polycondensation using Yamazaki phosphorylation procedure.The polymers obtained in high yield had high molecular weight with the inherent viscosity in the range of 0 50～0 70 dLg -1 .Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) indicated that the polymers had high glass transition temperature of 317～343℃ and good thermostability with 10% weight loss temperature above 440℃.They were readily soluble in polar solvents such as NMP、DMF and m cresol etc and clear,tough,flexible films can be cast from their DMAc solutions.The structure of monomer and their polymers was characterized by MS、FT IR and 1H NMR and they are consistant with the proposed structure.X ray diffraction showed that all poly(amide imide)s were amorphous.
基金the Key Natural Science Foundation of Shanghai (No.02ZA14004)
文摘Two aromatic polyimides were prepared by two- step way. Firstly, the poly（amic acid）s were synthesized from 1, 3 - bis（4 - aminophenoxy）benzene and two different aromatic dianhydrides. Secondly, polyimides were prepared via thermal imidization of poly（amic acid） precursors. The polyimides prepared were insoluble in common organic solvents such as tetrahydrofuran, chloroform and N, N- dimethyiformamide. The inherent viscosities of poly（amic acid）s were 1.82 dL/g and 2.67 dL/g. The high inherent viscosities were due to the strong intra- or intermolecular hydrogen interaction. The polyimides were characterized by mechanical and thermal analysis. It was found that the samples are of excellent thermal stability, higher glass-transition temperature and excellent dynamic mechanical and thermal properties.
