Abstract
AbstractThe 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.
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