含杂萘类三联苯结构聚芳酰胺酰亚胺合成与性能

Synthesis and properties of poly(aryl amide imide)s containing biphenyl-2,3-phthalazinone moieties

采用 Yamazaki膦酰化聚合体系 ,以自制的新型二胺 2 -( 4 -氨基苯基 ) -4 -[4 -( 4 -氨基苯氧基 ) -联苯基 ]-二氮杂萘酮 -1 ( )为单体 ,与自制的芳香二酸进行直接溶液缩聚反应 ,高产率地合成了一类新型含杂萘类三联苯结构聚芳酰胺酰亚胺 .新型聚合物的特性粘度为0 .4 9～ 0 .80 d L .g- 1 ( DMAc,( 2 5± 0 .5 )℃ ) ;以 MS、FT-IR、1 HNMR等分析手段研究了二胺单体 及其聚合物的结构 ;利用 DSC、TGA研究了聚合物的耐热性能 .结果表明 ,新型聚芳酰胺酰亚胺具有高的玻璃化转变温度 ( Tg =5 90～ 6 2 8K) ,氮气氛中 1 0 %热质量损失温度在 71 0～ 74 4K,聚合物 PIa～ PId的表面电阻系数的数量级为 1 0 1 5Ω,体积电阻系数的数量级为 1 0 1 6Ω .cm.X-射线衍射证明所有聚合物均为无定型结构 .聚合物在二甲基甲酰胺、1 -甲基吡咯烷酮和间甲酚等极性有机溶剂中可溶解并能浇注得到透明韧性薄膜 .

A novel diamine 2H-(4-aminophenyl)-4-[4-(4-aminophenoxy) biphenyl]-phthalazinone (I) containing azo hetero cycle was synthesized and reacted with different aryl dicarboxylic acids to prepare a series of new aromatic poly(amide imide)s by direct polycondensation using Yamazaki phosphorylation procedure. The poly(amide imide)s obtained in high yield have high molecular weight with the inherent viscosity in the range of 0.49-0.80 dL·g -1 . They exhibit high glass transition temperature (T g=590-628 K) and good thermostability (T d (%)=710-744 K). Their order of surface electrical resistance coefficient is 10 15 Ω and that of volume electrical resistance coefficient 10 16 Ω·cm. X-Ray diffraction shows that all polymers are amorphous. These polymers are readily soluble in polar solvents such as NMP, DMF and m-cresol, etc. and clear tough films are cast from their DMAc solutions. The structure of diamine Ⅰ and polymers has been confirmed by MS, FT-IR and 1HNMR.