Naslov
Kinetic model of the evaporation process of benzylbutyl phthalate from plasticized poly(vinyl chloride)

Autori
Mrklić, Željko ; Rušić, Davor ; Kovačić, Tonka

Izvornik
Thermochimica Acta (0040-6031) 414 (2004), 2; 167-175

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Evaporation process; Kinetic model; Plasticized polymer

Sažetak
The kinetic model of the physical process of evaporation of plasticizer from plasticized PVC foils was developed from the results of isothermal thermogravimetric investigation of evaporation of benzyl-butyl phthalate in the temperature range 120..150 oC under nitrogen flow. The kinetic parameters were estimated by integral method of analysis. Mathematical modelling of the kinetic of plasticizers evaporation was performed on the basis of function c=f(T, t) and kinetic equation of evaporation -dc/dt=f(T, c0, c(t)). The developed mathematical model was described by the general kinetic equation -dc/dt = (krexp(kpT) c0+kqT+kw) c(t). The differential quotients d(-dc/dt)/dT=f(T, c0, c(t))=f(T, c0, t) and d(-dc/dt)/dc0=f(T, c(t))=f(T, c0, t) were performed, and mathematical definition of the changes of the evaporation rate constant with the change of temperature and the change of the initial plasticized concentration were discussed.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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