In a fire, the polymer combustion occurs when gaseous fuels react with oxygen. The heating of a m... more In a fire, the polymer combustion occurs when gaseous fuels react with oxygen. The heating of a material could force the release of gaseous fuels during thermal decomposition and pyrolysis. The rate of pyrolysis to define the gaseous fuels is usually interpreted by means of the Arrhenius expression and a reaction model expression, which are characterized by an activation energy, a pre-exponential factor, and a reaction order value. Many methods are available for determining kinetic parameters from thermogravimetric experimental data. However, the most challenging issue is achieving an adequate balance between accuracy and simplicity. This work proposes a direct method for determining the kinetic parameters with only a thermogravimetric experiment at a single heating rate. The method was validated with six polymers, and the results were compared with those from similar procedures, such as the Lyon method and generalized direct method. The results achieved using the simpler approach o...
Polymer decomposition is such a complex phenomenon because of their intrinsic characteristics and... more Polymer decomposition is such a complex phenomenon because of their intrinsic characteristics and since each polymer has its own characteristics that make its behavior different from the others. Moreover, the chemical reactions that occur during the thermal decomposition are often highly dependent on the conditions of the tests and sample. In fact, thermal analysis tends to be far more sensitive to instrumental parameters than other branches of chemical analysis [1].
In a fire, the polymer combustion occurs when gaseous fuels react with oxygen. The heating of a m... more In a fire, the polymer combustion occurs when gaseous fuels react with oxygen. The heating of a material could force the release of gaseous fuels during thermal decomposition and pyrolysis. The rate of pyrolysis to define the gaseous fuels is usually interpreted by means of the Arrhenius expression and a reaction model expression, which are characterized by an activation energy, a pre-exponential factor, and a reaction order value. Many methods are available for determining kinetic parameters from thermogravimetric experimental data. However, the most challenging issue is achieving an adequate balance between accuracy and simplicity. This work proposes a direct method for determining the kinetic parameters with only a thermogravimetric experiment at a single heating rate. The method was validated with six polymers, and the results were compared with those from similar procedures, such as the Lyon method and generalized direct method. The results achieved using the simpler approach o...
Polymer decomposition is such a complex phenomenon because of their intrinsic characteristics and... more Polymer decomposition is such a complex phenomenon because of their intrinsic characteristics and since each polymer has its own characteristics that make its behavior different from the others. Moreover, the chemical reactions that occur during the thermal decomposition are often highly dependent on the conditions of the tests and sample. In fact, thermal analysis tends to be far more sensitive to instrumental parameters than other branches of chemical analysis [1].
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Papers by Alain Alonso