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<正>Three secondary amine terminated hyperbranched poly(ester-amine)s(defined as HPEA1,HPEA2 and HPEA3)were synthesized from piperazine(A_2)and trimethylolpropane triacrylate(TMPTA,B_3)at their molar ratios of 2.5:1,2.25:1 and 2.0:1,respectively.The