New thermal study of polymerization and degradation kinetics of methylene diphenyl diisocyanate
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This work investigates the thermal polymerization process of a methylene diphenyl diisocyanate (MDI) monomer as well as its thermal degradation following the ICTAC recommendations. MDI monomer is widely used as a synthetic resin in the production of MDF panels, as it provides compaction of the eucalyptus fibers by polymerization. Thermogravimetry/derivative thermogravimetric-differential thermal analysis (TG/DTG-DTA), differential scanning calorimetry, and mid-infrared spectroscopy were used in this study. The polymerization process (An) and degradation (Fn) process exhibited activation energy equal to 149.70 and 80.22 kJ mol−1, respectively. The combined the FTIR and kinetic information makes it possible to suggest the mechanism reaction, which is an inedited data in literature.
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Degradation, Methylene diphenyl diisocyanate, Non-isothermal kinetics, Polymerization, Thermal studies
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Inglês
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Journal of Thermal Analysis and Calorimetry, v. 133, n. 3, p. 1455-1462, 2018.
