Weathering Effect on Virgin PE & PE Coated with Polyamide/nanosilica Composite Coating
Polyethylene (PE) film coated with polyamide/nanosilica composite with varying composition were prepared and then exposed to ultraviolet radiation for accelerated weathering studies. The chemical and physical changes on nanocomposite coated PE film induced by QUV exposure were studied by monitoring the changes in mechanical properties, carbonyl index, IR effectiveness, and visible light transmission. The effect of polyamide/nanosilica composite coating on the durability and optical properties of polyethylene substrate was determined after 200 hrs and 500 hrs of ultraviolet exposure. UV weathering has resulted significant reduction of visible light transmission of nanocomposite coated PE film after 500 hrs of UV weathering. The mechanical properties of coated and uncoated PE film were tremendously affected by UV exposure. PE coated with nanocomposite coating layer showed higher strength loss rate compared to uncoated PE film. The surface protective coating of polyamide/nanosilica composite accelerated the photodegradation rate of PE film. This photodegradation effect was evident with the increasing of composite coating thickness and nanosilica content in PA/nanosilica coating material. There was no effect of weathering to the IR effectiveness of both coated and uncoated polyethylene film.
CHING YERN CHEE ISKANDAR IDRIS YAACOB
Department of Petrochemical Engineering, University Tunku Abdul Rahman Department of Mechanical and Materials Engineering,Faculty of Engineering, University of Malaya, Kua
国际会议
桂林
英文
1-7
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）