Naslov
Kinetic analysis of thermal and thermo-oxidative degradation of polyethylene (nano)composites

Autori
Ptiček Siročić, Anita ; Kratofil Krehula, Ljerka ; Katančić, Zvonimir ; Hrnjak-Murgić, Zlata

Izvornik
Composite interfaces (0927-6440) 21 (2014), 3; 179-189

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

Ključne riječi
nanocomposite ; filler ; thermal degradation ; kinetics ; zeolite

Sažetak
Thermal properties and degradation of polyethylene LDPE (nano)composites were investigated by isoconversional thermogravimetric analysis (TGA) in air and nitrogen atmosphere by applying the Kissinger–Akahira–Sunose (KAS) method. Low density polyethylene (LDPE) composites containing 3 wt % nanofiller Cloisite 20A and 4, 6 and 8 wt % of natural zeolite were prepared using extrusion/injection moulding. The parameters of thermal stability of the samples were determined i.e. onset temperature of the degradation (T90), which exhibit initial mass loss (10 mass %) and maximum loss rate temperature (Tmax). Also, activation energy (Ea) of samples were calculated and interpreted in terms of thermal degradation mechanisms. Under nitrogen, the thermal degradation of LDPE (nano)composites follows a random scission pathway but it was retarded and slowed by the presence of the fillers. The results show that thermo-oxidative degradation of studied (nano)composites is induced at lower temperatures and appears as much more complex and multi-stage process.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti, Interdisciplinarne tehničke znanosti

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