Development of a Semiglobal Reaction Mechanism for the Thermal Decomposition of a Polymer Containing Reactive Flame Retardants: Application to Glass-Fiber-Reinforced Polybutylene Terephthalate Blended with Aluminum Diethyl Phosphinate and Melamine Polyphosphate
Development of a Semiglobal Reaction Mechanism for the Thermal Decomposition of a Polymer Containing Reactive Flame Retardants: Application to Glass-Fiber-Reinforced Polybutylene Terephthalate Blended with Aluminum Diethyl Phosphinate and Melamine Polyphosphate
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Date
2018-09-17
Authors
Ding, Yan
Stoliarov, Stanislav I.
Kraemer, Roland H.
Advisor
Citation
Ding, Y.; Stoliarov, S.I.; Kraemer, R.H. Development of a Semiglobal Reaction Mechanism for the Thermal Decomposition of a Polymer Containing Reactive Flame Retardants: Application to Glass-Fiber-Reinforced Polybutylene Terephthalate Blended with Aluminum Diethyl Phosphinate and Melamine Polyphosphate. Polymers 2018, 10, 1137. doi: https://doi.org/10.3390/polym10101137
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Abstract
This work details a methodology for parameterization of the kinetics and thermodynamics
of the thermal decomposition of polymers blended with reactive additives. This methodology
employs Thermogravimetric Analysis, Differential Scanning Calorimetry, Microscale Combustion
Calorimetry, and inverse numerical modeling of these experiments. Blends of glass-fiber-reinforced
polybutylene terephthalate (PBT) with aluminum diethyl phosphinate and melamine polyphosphate
were used to demonstrate this methodology. These additives represent a potent solution for imparting
flame retardancy to PBT. The resulting lumped-species reaction model consisted of a set of first- and
second-order (two-component) reactions that defined the rate of gaseous pyrolyzate production.
The heats of reaction, heat capacities of the condensed-phase reactants and products, and heats of
combustion of the gaseous products were also determined. The model was shown to reproduce
all aforementioned experiments with a high degree of detail. The model also captured changes
in the material behavior with changes in the additive concentrations. Second-order reactions
between the material constituents were found to be necessary to reproduce these changes successfully.
The development of such models is an essential milestone toward the intelligent design of flame
retardant materials and solid fuels.
Notes
Partial funding for Open Access provided by the UMD Libraries' Open Access Publishing Fund.