Investigation on Ultraviolet Absorption Properties, Migration, and Catalytic Performances of Ferrocene-Modified Hyper-Branched Polyesters

The ultraviolet absorption properties of a series of ferrocene-modified hyper-branched polyesters (HBPE-Fcs) were analyzed by Ultraviolet/visible spectrometry. HBPE-Fcs were used as burning rate catalyst components added into hydroxyl-terminated polybutadiene (HTPB) based elastomers to investigate their migration behavior. Migration inhibition effects of HBPE-Fcs in different aging conditions were analyzed. The diffusion coefficients (D) of the migration components were calculated according to Fick's law of diffusion. The catalytic performances of HBPE-Fcs for the thermal decomposition of cyclotrimethylenetrinitramine (RDX) were also investigated by non isothermal measurements using Kissinger method. The incorporation of ferrocenes into hyper-branched polyesters (HBPEs) endows HBPEs with new ultraviolet absorption properties. The migration of HBPE-Fc was minimized by grafting ferrocene on the hyper-branched structures compared to that of simple ferrocene derivatives. HBPE-Fcs present efficient catalytic effects on the thermal degradation of RDX; and, the catalytic reactions were characterized by decreased activation energies and increased rate constants.