超支化不饱和聚(酰胺-酯)的改性及热分解动力学  

Modification of Hyperbranched Unsaturated Poly(amine-ester)s and the Thermal Degradation Kinetics

作　　者：王敏捷[1] 张青[1] 李春子[1] 巴信武[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2007年第3期292-299,共8页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金资助项目(B2004000093)

摘　　要：采用不同链长的十四酰氯和十八酰氯对超支化不饱和聚(酰胺-酯)(MHBP)的端羟基进行原位端基改性,制备出2种改性超支化聚合物,用傅立叶红外光谱(FTIR)、热重分析(TGA)、黏度法等对其结构及性能进行表征,并研究了它们的热分解行为及其热分解动力学.结果表明,其热分解反应不是一级反应,改性超支化聚合物的热稳定性与末端烷烃链的长度有关,用Ozawa法求出了热分解表观活化能.The end groups of hyperbranched unsaturated poly（amine-ester）s were respectively modified with myristic acid and stearic acid. The products were characterized by FTIR, TGA and intrinsic viscosity measurement. The thermal degradation behavior and thermal degradation kinetics were studied. The non-isothermal degradation behavior of HBP,MHBP-14 and MHBP-18 were studied by using thermogravimetry analysis in nitrogen. They were not a first order reation. The thermostability of the modified hyperbranched polymers related with the length of alkane chains at the molecule ends, so the apparent activation energy of MHBP-18 was bigger than MH-BP-14.

关 键 词：超支化不饱和聚(酰胺-酯) 改性 热分解动力学 

分 类 号：O631.22[理学—高分子化学]