Thermal Properties of Olive Pomace Filled Linear Low Density Polyethylene Bio-Composites

• Published in: Journal of macromolecular science. Physics Vol. 60; no. 11; pp. 957 - 969
• Main Authors: Banat, Raid, Al-Rawashdeh, Manal, Aljnaid, Malek
• Format: Journal Article
• Language: English
• Published: New York Taylor & Francis 02.11.2021; Marcel Dekker, Inc
• Subjects: bio-composite; Calorimetry; Composite materials; coupling agent; Coupling agents; Crystallization; Density; Differential scanning calorimetry; Enthalpy; Fillers; Glass transition temperature; Gravimetric analysis; Heat of crystallization; linear low-density polyethylene; Low density polyethylenes; Melt temperature; Melting; olive pomace filler; Polyethylene; Thermal degradation; Thermal properties; Thermodynamic properties; Transition temperatures
• ISSN: 0022-2348; 1525-609X
• DOI: 10.1080/00222348.2021.1923877

Differential scanning calorimetry (DSC) and thermo-gravimetric analysis (TGA) were performed to evaluate the influence of olive pomace flour (OPF) and a coupling agent (C) on linear low-density polyethylene (LLDPE) bio-composites. The glass transition temperature (T g ), melting temperature (T m ), enthalpy of fusion (ΔH m ), crystallization temperature (T cryst . ), heat of crystallization (ΔH cryst , ) and percent crystallinity (X c ) were extracted from the DSC results. The degradation behavior was extracted from the TGA. T g value (-114 °C) was unaffected by the addition of both OPF and C. A sharp DSC T m peak, around 125 °C, was observed with its position being dependent on both filler and C contents. The ΔH m for the filler at 40% content decreased slightly, from 132 J/g for 0% filler to 123 J/g. TGA showed that the thermal degradation of LLDPE in the composite became easier upon increasing the OPF filler and coupling agent.