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- Title
Extraction of natural fibers of Catole coconut (Syagrus Cearensis): Application as reinforcing filler in polypropylene‐based composites.
- Authors
do Nascimento, Emanuel Pereira; Luna, Carlos Bruno Barreto; Ferreira, Eduardo da Silva Barbosa; dos Santos Filho, Edson Antonio; Siqueira, Danilo Diniz; Wellen, Renate Maria Ramos; Araújo, Edcleide Maria
- Abstract
Polypropylene/Syagrus Cearensis fiber composites compatibilized with polypropylene‐graft‐maleic anhydride (PP‐g‐MA) and styrene(ethylene‐butylene)‐styrene copolymer (SEBS‐g‐MA) were successfully produced using a co‐rotating twin‐screw extruder followed by injection molding. The composites were characterized by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The mechanical properties were determined by Izod impact and tensile testing. Thermal properties were obtained by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). Heat deflection temperature (HDT) was determined to study the thermomechanical properties of the composites. XRD and DSC indicated the presence of two polypropylene polymorphs: α and β. The unmodified PP/Fiber composites showed an incompatible behavior, presenting low fiber/matrix interaction and poor interfacial adhesion. The poor compatibility led to low elongation at break and impact strength but high tensile strength. PP‐g‐MA coupling agent promoted some adhesion to the PP/fiber interfaces but not enough to improve the impact strength. The composites with PP‐g‐MA exhibited improved tensile modulus and strength. The enhanced PP/fiber interfacial interaction promoted by SEBS‐g‐MA generated a better interplay of mechanical properties, improving impact strength and elongation at break while preserving the elastic modulus and tensile strength. In general, the fibers enhanced the thermomechanical stability of PP, as evidenced by higher HDT values.
- Subjects
NATURAL fibers; COMPATIBILIZERS; THERMOMECHANICAL properties of metals; FOURIER transform infrared spectroscopy; ELASTIC modulus; THERMAL properties; IMPACT strength
- Publication
Polymer Composites, 2023, Vol 44, Issue 9, p5891
- ISSN
0272-8397
- Publication type
Article
- DOI
10.1002/pc.27535