engleski

Polymerization of 1, 4-dinitrosobenzene: Kinetics and Submicrocrystal Structure

In this study, the structure of the polycrystalline poly(l, 4-phenyleneazine N, N- dioxide) was investigated by Scanning Electron Microscopy and related with the previously calculated molecular structure. Kinetics of polymerization of 1, 4-dinitrosobenzene, prepared by both cryogenic UV photolysis and in vacuo deposition were measured by time-resolved FT-IR spectroscopy. Acquired data was analyzed by curve fitting with the standard Avrami- Erofeev and two-step consecutive reactions models. Activation parameters were calculated from Arrhenius and Eyring-Polanyi equations, for both models. The results obtained by using the two models, along with the goodness-of-fit parameters, were compared. It was shown that both bulk-based and reaction-based models can be used to adequately describe solid-state chemical reaction kinetics. Furthermore, a two- step consecutive reactions model is a suitable alternative to the most commonly used AvramiErofeev model.

Scanning electron microscopy, Polymerization, Kinetic models, Solid state, Activation parameters

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