Abstract

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.

摘要

进行差示扫描量热法 (DSC) 和热重分析 (TGA) 以评估橄榄果渣粉 (OPF) 和偶联剂 (C) 对线性低密度聚乙烯 (LLDPE) 生物复合材料的影响。玻璃化转变温度（Ť_克），熔融温度（Ť_米），熔融焓（ΔH_米），结晶温度（Ť _CRYST。），结晶热（ΔH _CRYST，）和结晶度百分比（X _{c ^}）从提取DSC 结果。降解行为是从 TGA 中提取的。Ť _{g ^}值 (–114 °C) 不受添加 OPF 和 C 的影响。在 125 °C 附近观察到一个尖锐的 DSC T _m峰，其位置取决于填料和 C 的含量。填料含量为 40% 时的ΔH _m略有下降，从 0% 填料的 132 J/g 降至 123 J/g。TGA 表明，随着 OPF 填料和偶联剂的增加，复合材料中 LLDPE 的热降解变得更容易。