Aliphatic hyperbranched pely(ester-amine)s with terminal acrylate groups were synthesized by Michael addition reaction between pizine and trimethylol- propanetriacrylate (TMPTA) under various molar ratios

and their structures were characterized by 1H-NMR．GPC and DSC analysis．The multi-peaks within δ 4.04～4.18 (RCH2OCOR’)in the 1H-NMR spectra were analyzed andthe peaks at δ4.15

δ4.06～4.07 and δ 4.04 can be assigned to terminal(T)

linear(L) and dendritic units(D)

respectively．Based on 1H-NMR spectra

the degree of branching (DB) for these polymers were calculated by using both the Frechet method and the Frey method．With the molar ratio between pizine and TMPTA increased to 1/1

the terminate units decreased

both of the dendritic and linear units increased

while Mn and Mw/Mn became large and the Tg value became hish

accordingly．Moreover

cured films were obtained throuIsh UV radiation of the polymers．The gel contents for the films decreased with increasing the molar ratio between pizine and TMPTA

which may account for the changes of their mechanical properties．