Experimental Study on the Effect of Adding Carbon Black Powder on Tensile Strength of LDPE Films under Artificial Weathering Condition

Abstract:

The properties of plastic parts that used for outdoor applications are changed under weathering conditions. Weathering involves considering the effects of solar radiation, temperature, humidity, pollutants. By adding some additives such as carbon black, TiO2, Hals and Tinuvin, the weathering effect could be decreased. In this study, LDPE films by adding different percentages (0.1, 0.5 and 1%) of carbon black (C.B.) with 0.2 mm thickness were produced by extrusion process. Samples were cut according to ASTM D882 and to accelerate the tests, samples located in accelerated artificial weathering device up to 1400 hour. The device was set at 40°C and humidity of 50%. Required samples for tensile strength test bring out of device at selected period and tensile strength was done by 350 mm/min strain rate. The results show that samples containing carbon black have tensile stress and elongationmore than the clear films. Carbon black absorbs UV light and heat that causing to delay in broken links and destroying the molecular. The optimum percent for tensile stress was 0.5 and for elongation was 1% C.B.

• Periodical: Applied Mechanics and Materials (Volume 330)
• Pages: 32-36
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.330.32
• Online since: June 2013
• Authors: S.A.M. Rezavand, S. Falah Kordi, Taher Azdast
• Keywords: Artificial Weathering, Carbon Black (CB), Elongation at Break, LDPE, Tensile Strength, Thermoplastic Films

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