含叔丁基可溶性芳香聚酰胺的制备及其性能研究

摘要

采用含叔丁基二胺的单体3,3'-二叔丁基-4,4'-二氨基二苯基-4"-叔丁基苯基甲烷(TADBP)分别与萘-1,4-二甲酸、间苯二甲酸和4,4二苯醚二甲酸3种二酸单体通过Yamazaki膦酰化法缩聚制得一系列新型可溶性芳香聚酰胺(PA).通过FT-IR、1 H-NMR、TG、DSC等测试手段研究了含叔丁基芳香聚酰胺的结构与性能,以及聚合物结构对其溶解性能、热性能的影响.结果表明:PA具有优异的溶解性能,常温下不仅能溶于高沸点的N-甲基吡咯烷酮(NMP)、N,Ⅳ-二甲基乙酰胺(DMAc)、N,N-二甲基甲酰胺(DMF)、二甲基亚砜(DMSO)等强极性溶剂中,加热条件下甚至能溶于四氢呋喃、氯仿、二氯甲烷等低沸点溶剂;同时,PA还具有良好的热性能,玻璃化转变温度(Tg)为188～193℃,氮气氛围下失重5％和10％时的热失重温度分别为391～416℃和404～437℃.%A series of soluble aromatic polyamides (PA) were prepared using diamine monomer 3,3'-ditertbutyl-4,4'-diaminodiphenyl-4"-tertbutylphenylmethane (TADBP) and three aromatic dicarboxylic acids by Yamazaki phosphorylating method.The structures and properties of PA were studied by FT IR,1 H-NMR,TG and DSC.Results show that these polymers have good solubility in high-boiling organic solvents at room temperature,such as N,N-dimethylformamide (DMF),N,N-dimethylacetamide (DMAc),N-methyl-2-pyrrolidone(NMP) and dimethyl sulfoxide(DMSO).Moreover,they can be dissolved in lowboiling solvents under heating,such as tetrahydrofuran,chloroform,methylene chloride.Furthermore,they have outstanding thermal properties with the glass transition temperature(Tg) in the range of 188～ 193 ℃,as well as T5％ and T10％ mass loss temperature ranges of 391～416 ℃ and 404～437 ℃ in nitrogen atmosphere.