Hyperbranched Polyaminoethylene Carbonates of the Second and Third Generations and Their Copper(II) Complexes: Synthesis, Structure and Properties

Abstract

The first representatives of hyperbranched polyaminoethylene carbonates of the second and third generations were synthesized from triethanolamine and dimethyl carbonate. The reaction of these polymers with CuCl₂∙2H₂O yielded Cu(II) complexes. Structure of hyperbranched macromolecules and Cu(II) complexes was proved by ¹H, ¹³C NMR, IR, UV-Vis spectroscopy, titrimetry, elemental analysis and TGA. By ¹H NMR spectroscopy and titrimetry data, hyperbranched polyaminoethylene carbonates of the second and third generations have 11 and 21 terminal hydroxyl groups, branching degree of 0.8 and 0.82, M_n equal to 1782 and 3986 g/mol, respectively. The thermal transformations in the polymers were studied by TGA method. The morphology and hydrodynamic diameter of particles were determined by SEM, CLSM, NTA and dynamic light scattering methods. The temperature dependence of the kinematic viscosity of polymers was revealed, and the refractive index and pH of hyperbranched polymers were determined.