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. 2021 Apr 8;13(8):1200. doi: 10.3390/polym13081200

Table 5.

Comparison of the selective studies on the optimum content of the fiber on the mechanical properties of the PBS/natural fiber composites.

PBS/Natural Fiber Preparation Method Optimum Concentration (%) of the Fiber Type of Modifier Mechanical Properties Refs
PBS/Palm fiber (PF) and glycidyl
methacrylate-grafted poly(butylene succinate)
(PBS-g-GMA)/PF		 Melt mixing at 140–150 °C 40 wt.% for modified fiber composites. Glycidyl methacrylate-grafting
  • -

    Mechanical properties of the PBS-g-GMA/PF system was higher than that of PBS/PF composites due to a better adhesion between PF and PBS-g-GMA matrix.

 [136]
PBS/Ramie fibers Twin-screw extrusion and injection molding 30% of the ramie content. Single ramie fiber was modified with silane, alkali, acetic anhydride, and maleic anhydride treatment.
  • -

    The interfacial adhesion between the polymer and fiber was done through interfacial shear strength (IFSS).

  • -

    It was found that alkali treatment showed the highest IFSS when compared with other modifiers.

  • -

    Improved tensile strength and modulus of PBS with fiber loading (untreated and treated fiber).

  • -

    Mechanical properties of treated fiber composites were better than those of untreated fiber composites.

 [137]
PBS/rice straw fiber Injection molding 30% of silane treated fibers 3-aminopropyltriethoxysilane (APTES), 3-aminopropyltrimethoxysilane (APTMES), 3-(2-aminoethylaminopropyl)-triethoxysilane (AEAPTES) and 3-(2-aminoethylaminopropyl)-trimethoxysilane (AEAPTMES) fiber treatment.
  • -

    Mechanical properties were investigated at 70:30 of polymer: fiber (with fiber size of 100–300 µm).

  • -

    Improved tensile strength due to fiber treatment. Best results were obtained with AEAPTMES fiber treatment.

 [128]
PBS/curaua fiber Thermo-pressing molding 30 wt.% of the curaua fiber. Alcohol and cyclohexane fiber pre-treatment.
  • -

    Enhancement in impact resistance with fiber loading. Impact resistance increased from 52 Jm−1 (for PBS) to approximately 345 Jm−1 (at 30 wt.% fiber loading).

  • -

    Flexural modulus improved by 64% with fiber loading when compared with neat PBS.

 [138]
PBS/oil palm mesocarp fiber (OPMF) and PBS/oil palm empty fruit bunch fiber (OPEFBF) Melt blending Various contents of the fiber resulted in improvement of various parameters of mechanical properties. Fibers were washed with distilled water and acetone.
  • -

    Decrease in tensile strength with fiber loading. Tensile strength decreased from 37.10 MPa (for neat PBS) to 25.55 MPa (10 wt% OPMF) and 25.67 MPa (10 wt% OPEFBF).

 [139]