Methodological study reveals a master-curve approach to determine reaction kinetics across heating rates in polymer and mineral pyrolyses, improving thermal stability assessments.
Key Points
To develop and validate a simplified analytical method for extracting reaction kinetic parameters from thermogravimetric curves across varying heating rates.
Formulated mathematical derivations to evaluate the effect of heating rate on thermogravimetric curves and construct a unified master curve from experimental runs.
Applied the analytical framework to experimental pyrolysis data for calcium oxalate and nylon 6.
Assessed data conversion across varying temperature profiles and evaluated standard definitions of material thermal stability.
Derived kinetic parameters for the pyrolyses of calcium oxalate and nylon 6 showed high agreement with previously reported benchmark values.
The master curve approach successfully unified experimental thermogravimetric data collected at different heating rates.
The analytical framework enabled conversion of thermal analysis data across arbitrary temperature-change conditions, highlighting shortcomings in conventional definitions of thermal stability.