Bending strength 1 Coupling agents 1 Cracks 1 Environmental stress cracking resistances 1 Epoxidised natural rubber 1 Fiber reinforced plastics 1 Fibre-reinforced epoxy 1 Flexural properties 1 Glass fibers 1 Hemp 1 Impact strength 1 Kenaf fibers 1 Liquid epoxidised natural rubber 1 Liquids 1 Matrix modification 1 Mechanical properties 1 Reinforcement 1 Rubber 1 Rubber additions Scanning electron microscopy 1 Silane coupling agent 1 Sodium hydroxide 1 Synthetic rubber 1 epoxy 1 glass fibre 1 hybrid 1 kenaf fibre 1 mechanical properties 1