Abstract
A thermal degradation study of polyesterurethane based on 4,4′-diphenylmethane di-isocyanate interacted with “d”-block cations is presented. Studies were made of the influence of both the atomic number Z in the 3d series (Cr 3+, Fe 3+, Co 2+ and Cu 2+) and of the principal quantum number n = 3, 4 and 5 (Cu 2+, Ag +, Au 3+). For the relationship between the activation energy and the reacted fraction, an analytical equation that we proposed in a previous publication was verified. The physical parameter z*/ r, calculated using Slatter's rules, gives semi-quantitative information on the thermal behavior of these compounds.
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