Thermo-oxidative stability of waterborne polyurethanes with catalysts of different selectivity evaluated by non-isothermal thermogravimetry | Zendy

Suzana Cakić | Zendy; Goran Nikolić | Zendy; Jakov Stamenković | Zendy

Open Access

Thermo-oxidative stability of waterborne polyurethanes with catalysts of different selectivity evaluated by non-isothermal thermogravimetry

Author(s) -

Suzana Cakić,

Goran Nikolić,

Jakov Stamenković

Publication year - 2007

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0707723c

Subject(s) - thermogravimetry , catalysis , thermal stability , selectivity , isothermal process , arrhenius equation , degradation (telecommunications) , chemistry , materials science , chemical engineering , kinetics , activation energy , nuclear chemistry , polymer chemistry , organic chemistry , inorganic chemistry , thermodynamics , telecommunications , physics , quantum mechanics , computer science , engineering

Thermogravimetry was used for the evaluation of the thermo-oxidative stability of waterborne polyurethanes (wbPUR) containing catalysts of different selectivity. From Arrhenius plots, activation energies of between 50 and 120 kJ mol -1 for wbPUR were determined, depending on the temperature interval, selectivity of the catalyst and degree of degradation. Waterborne polyurethanes without catalyst showed lower thermal stability than waterborne polyurethanes with catalysts of different selectivity. Non-isothermal thermogravimetry indicated the presence of different degradation processes and enabled the kinetics parameters at higher degrees of degradation to be evaluated.

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