This paper is a review on the tensile properties of natural fiber reinforced polymer composites. Natural
fibers have recently become attractive to researchers, engineers and scientists as an alternative reinforcement
for fiber reinforced polymer (FRP) composites. Due to their low cost, fairly good mechanical properties,
high specific strength, non-abrasive, eco-friendly and bio-degradability characteristics, they are
exploited as a replacement for the conventional fiber, such as glass, aramid and carbon. The tensile properties
of natural fiber reinforce polymers (both thermoplastics and thermosets) are mainly influenced by
the interfacial adhesion between the matrix and the fibers. Several chemical modifications are employed
to improve the interfacial matrix–fiber bonding resulting in the enhancement of tensile properties of the
composites. In general, the tensile strengths of the natural fiber reinforced polymer composites increase
with fiber content, up to a maximum or optimum value, the value will then drop. However, the Young’s
modulus of the natural fiber reinforced polymer composites increase with increasing fiber loading. Khoathane
et al. [1] found that the tensile strength and Young’s modulus of composites reinforced with
bleached hemp fibers increased incredibly with increasing fiber loading. Mathematical modelling was
also mentioned. It was discovered that the rule of mixture (ROM) predicted and experimental tensile
strength of different natural fibers reinforced HDPE composites were very close to each other. Halpin–
Tsai equation was found to be the most effective equation in predicting the Young’s modulus of composites
containing different types of natural fibers.