Kinetics of thermal decomposition of polymethylmethacrylate in an oxidizing environment

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Resumo

Using thermogravimetric analysis (TGA), the kinetic constants of the thermal decomposition of polymethylmethacrylate (PMMA) in an oxidizing environment were determined over a wide range of sample heating rates. The values of the kinetic constants of polymer decomposition were determined by the Kissinger method. It is shown that as the degree of polymer decomposition increases, the rate constant decreases at a constant temperature.

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Sobre autores

E. Salgansky

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Science

Autor responsável pela correspondência
Email: sea@icp.ac.ru
Rússia, Chernogolovka

M. Salganskaya

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Science

Email: sea@icp.ac.ru
Rússia, Chernogolovka

D. Glushkov

National Research Tomsk Polytechnic University

Email: sea@icp.ac.ru
Rússia, Tomsk

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2. Fig. 1. Curves of mass change during thermal decomposition of PMMA in an oxidizer flow. The numbers near the curves are the heating rates in K/min.

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3. Fig. 2. Curves of the dependence ln(β/T 2) = f(1/T) for different values ​​of the degree of PMMA conversion: 1 – 25, 2 – 50, 3 – 75%, to determine the kinetic characteristics of its decomposition in the oxidizer flow.

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4. Fig. 3. Temperature dependence curves ln(K) = ln(k0) − E/RT, where K is the rate constant of the PMMA decomposition reaction, k0 is the pre-exponential factor, E is the activation energy, T is the temperature, R is the universal gas constant.

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