Impact strength 13 Tensile strength 6 Mechanical properties 4 Scanning electron microscopy 4 Fillers 3 Hemp 3 History of engineering and technology 3 Kenaf fibers 3 Polyesters 3 Reinforcement 3 Rubber 3 Bending strength 2 Fibers 2 Flexural properties 2 Fracture 2 Hybrid composites 2 Injection molding 2 Liquids 2 Mechanical and thermal properties 2 Morphology 2 Nanostructured materials 2 Poly lactic acid 2 Polypropylenes 2 Technology: general issues 2 Thermodynamic stability 2 3-D printing 1 3D printers 1 3D printing 1 3D-printing 1 Acid medium 1