Effect of Filler Grain Size on Some Physical Properties of Nano Composite Based On Blend Matrix

Abstract

Abstract:-This research studies the effects of particle grain size of reinforcing material on mechanical properties of composite material. A polymeric blend of epoxy resin and poly sulphide rubber [Ep 70% + PSR 30%] was used as a matrix, and nanozirconia powder (Nano-ZrO2) as a reinforcement material with various grain sizes (20-40) nm, (40-50) nm with the same weight fraction (2% wt.), and research samples were prepared by Handle Lay-Up Modeling.Tensile Strength, Hardness tests and the study of Surface Topography were conducted using a scanning electron microscope (SEM) without immersion and after immersion in normal water for 10 weeks, and the inspection of absorbency material.The results of the tests before immersion revealed that reinforcement by zirconia nanoparticles powder improves the mechanical properties, especially in the case of small grain size (20-40) nm as composites recorded highest tensile strength (5.93 MPa), and the highest hardness of the surface (57), while it was less so in the case of big grain size (40-50) nm tensile strength it (2.036 MPa) and surface hardness (41).Absorbing material for water, after immersing the samples in ordinary water, negatively influenced the mechanical properties with the exception of increasing the hardness of the surface at the end of the period of immersion.