Infrared spectroscopy study of photodegradation of polymer modified asphalt binder

• Published in: Journal of applied polymer science Vol. 125; no. 4; pp. 3275 - 3281
• Main Authors: Araujo, Maria de Fátima A. de S., Lins, Vanessa de F. C., Pasa, Vânya M. D., Fonseca, Cíntia Gonçalves
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15-08-2012; Wiley; Wiley Subscription Services, Inc
• Subjects: aging; Application fields; Applied sciences; Asphalt; Binders; Bitumen. Tars. Bituminous binders and bituminous concretes; Bituminous cements; Buildings. Public works; degradation; Exact sciences and technology; Fourier transforms; FTIR; Infrared spectroscopy; Insulation; Materials; Materials science; Oxidation resistance; Polymer industry, paints, wood; Polymers; radiation; rubber; Technology of polymers; Weathering; SBS; Thermoplastic rubber; degradation; Experimental study; Polymer modified asphalt; Asphalt; Triblock copolymer; Oxidation resistance; radiation; FTIR; rubber; Photochemical stability; Artificial ageing; Chemical properties; aging; Photochemical degradation
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.36520

The effect of solar radiation in the aging of the asphalt binder can be considered relevant in several countries due to the high level of insulation. This article deals with the comparative aging of a conventional asphalt binder and styrene‐butadiene‐styrene modified asphalt binder samples under the effect of weathering. The samples were exposed to cycles of xenon radiation, moisture, and temperature. The degradation of binders was analyzed by using the technique of Fourier transform infrared spectroscopy. The CH/CO ratio decreased 92.5% for the conventional asphalt cement and 74% for the polymer modified asphalt after 150 h of exposure in a weathering chamber. The oxidation resistance of styrene‐butadiene‐styrene modified asphalt binder was higher than the conventional asphalt cement evaluated by using the weathering test and infrared spectroscopy analysis. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012