Solution Aggregation Behaviors of Hyperbranchen Poly(Easter-Amine)s

A series of hyperbranched poly(easter-amine)s(HPEA) were synthesized by Michael addition reaction between trimethylolpropanetriacrylate(TMPTA) and piperazine at various molar ratios.Based on analysis of the()~1H-NMR spectra of model reaction products derived from TMPTA and piperidine at molar ratio of 1∶1,1∶2 and 1∶3,the characteristic peaks within(4.0)~(4.2) were used to distinguish the characteristic structural units in HPEA.The aggregation behaviors of HPEA in acetone-acidic water selective solvent were studied by dynamic light scattering and TEM techniques.The influence of polymer structure and the solution conditions on the size of the aggregates were investigated.