Synthesis and Characterization on Semi-aromatic Polyamide Containing Benzoxazole Unit
writer：J. Hu, J. He, H. Gu ,J. Qiu ,Y. Huang , D. Sun
keywords：Semi-aromatic, Polyamide, Benzoxazole
source：期刊
specific source：Journal of Harbin Institute of Technology
Issue time：2011年
In order to obtain a novel polyamide having excellent heat-resistant properties which could be anticipated as a thermal modifier for aliphatic polyamide,a series of new semi-aromatic polyamides ( BO6,BO8,BO10 ) containing benzoxazole unit were synthesized based on 5-amino-2-(p-aminophenyl) benzoxazole (ABO)and aliphatic acids (adipic,suberic and sebacic acid) by means of Yamazaki phosphorylation method.The effect of reaction temperature on the inherent viscosity of the polymers was studied,and the structures of products were characterized by FTIR,1H-NMR,and the heat resistance of the polymers was studied by DSC and TG.The results showed that the reaction temperature gives the polymers the highest viscosity at around 90 ℃,130 ℃ and 130℃ for BO6,BO8 and BO10,respectively.The heat resistance of the new semi-aromatic polyamides is much higher than that of the common aliphatic polyamides.In addition,the products show good solvent resistance and crystallization properties.