Naslov
Poly(3-hydroxybutyrate) nanocomposites: Isothermal degradation and kinetic analysis

Autori
Erceg, Matko ; Kovačić, Tonka ; Klarić, Ivka

Izvornik
Thermochimica Acta (0040-6031) 485 (2009); 26-32

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

Ključne riječi
Isothermal thermogravimetry; Kinetic analysis; Nanocomposites; Organically modified montmorillonite; Poly(3-hydroxybutyrate)

Sažetak
Polymer nanocomposites consisted of biodegradable poly(3-hydroxybutyrate) (PHB) and organically modified montmorillonite Cloisite30B (30B) have been prepared by the solution casting method and isothermally degraded at 230, 235, 240 and 245C. The addition of 30B increases the thermal stability of PHB and the most pronounced effect has the addition of 1 wt. % of 30B. Kinetic analysis was performed using model-free isoconversional and reduced time plots (RTP) methods. The isothermal degradation of pure PHB and PHB/30B nanocomposites can be separated in two distinct regions: the first where small mass loss appears and the second, assigned as the main degradation mechanism, where the main mass loss takes place. The empirical kinetic triplets (E, A, and g(alpha)) for the main degradation mechanism were determined.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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