Study of effect of accelerated ageing on Flexural properties of the blended High density polyethylene material with calcium carbonate in different ratio

Abstract Accelerated weathering tests were devised to study the effect of actual outdoor weather in a relatively short time period. These tests often produced misleading results that are different to interpret or correlate with the result of the actual outdoor exposure. The reason for such a contradiction is that in many laboratory exposure , the wavelength of lights are distributed differently than in normal sunlight, possibly producing effects different from those produced by outdoor weathering . All plastic seem to be especially sensitive to wavelengths in the ultraviolet region. If the accelerated device has unusually strong emission at the wavelength of sensitivity of a particular polymer, the degree of acceleration is disproportionately high compared to outdoor exposure. The temperature of the exposure device also greatly influences the rate of degradation of a polymer. The test is devised to evaluate the stability of plastic material exposed outdoors to varied influences that comprise weather exposure conditions that are complex and changeable. Important factors are climate, time of year and the presence of industrial atmosphere In present experiment Particular size of calcium carbonate is reinforced in high density polyethylene (HDPE) in different weight ratio .The objective of present experiment to study the Flexural properties after ageing at +40°C and 95% relative Humidity (8Hrs : 8Hrs ) heat to condensation ratio of reinforced blended material as compare to neat material. Keyword: Calcium Carbonate , HDPE , Flexural Properties, Ageing and relative Humidity