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Synthesis and Properties of Soluble Aromatic Polyamides Containing Tert-Butyl

QIU Guo-quan;CHEN Bei-cai;HUANG Xiao-hua;LIU Chan-juan;WEI Chun;Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials,College of Materials Science and Engineering,Guilin University of Technology;  
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 FTIR,~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.
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