Biocomposites based on PCL and macaiba fiber. Detailed characterization of main properties

Biocomposites of poly (ε-caprolactone)/Macaiba (PCL/MF) upon fiber addition ranging from 10% to 20% were successfully extruded and thoroughly characterized by torque rheometry, thermogravimetry (TG), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), contact angle, heat deflection temperature (HDT), scanning electron microscopy (SEM), mechanical properties in tension, flexural and impact. No degradation evidences were verified during processing and all PCL/MF biocomposites presented higher thermal stability related to neat PCL. Narrower crystallization peaks were shifted to higher temperatures suggesting Macaiba fiber nucleating effect whereas its oil may be acted as plasticizer for PCL changing to lower or higher the mechanical properties depending on the investigated parameter. Throughout this work is shown MF provides a sustainable alternative to PCL biocomposites with wider applications. (paper)