A Nonisothermal Study of Organoiron Poly(alkynyl methacrylate) Coordinated to Dicobalt Hexacarbonyl Using Advanced Kinetics Modelling

Autor: Rawda M. Okasha, Alaa S. Abd-El-Aziz, Christopher L. Rock, A.A. Joraid
Rok vydání: 2013
Předmět:
Zdroj: Journal of Inorganic and Organometallic Polymers and Materials. 24:121-127
ISSN: 1574-1451
1574-1443
Popis: Non-isothermal crystallisation studies of Organoiron poly(alkynyl methacrylate)s coordinated to dicobalt hexacarbonyl using differential scanning calorimetry (DSC) are reported. Two exothermic peaks appear on crystallisation of the polymers under investigation. Four isoconversional methods (the differential method of Friedman, the integral methods of Ozawa–Flynn–Wall and Vyazovkin and ASTM E698) were used to determine the variation of the activation energy for crystallisation with reaction progress. The DSC data were analysed with the advanced thermokinetics software package AKTS-Thermokinetics. The change of a methyl group, CH3, to a hydrogen atom, H, in the system tends to shift the crystallisation peaks to a lower temperature at the same heating rate. However, the methyl group has lower activation energy. Prediction of the isothermal reaction progress was employed to calculate the reaction model, g(α), and the system was found to follow the A1.5 solid state reaction model. The Raman spectra and X-ray diffraction of the polymer were also investigated.
Databáze: OpenAIRE
Externí odkaz: