Infrared spectroscopy study of photodegradation of polymer modified asphalt binder

Abstract

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

Three-Dimensional Visualization for Early-Stage Evolution of Polymer Aging

“…Currently, chemiluminescence, thermogravimetry analysis, and oxygen consumption experiments have been implemented to study the polymer aging evolution. − These investigations are based on the simulation of the aging process for polymers through a heating progress, and the signal changes are recorded as a function of time. − However, these techniques can only provide statistic results for polymer aging at a macroscopic scale. − In addition, Fourier transform infrared spectroscopy (FT-IR) has been regarded as the most conventional technique to detect the variations of functional groups during the polymer aging, such as hydroxyl, carbonyl, and ketone groups. − However, the sensitivity of the FT-IR technique is not competent for ultratrace detection of these functional groups in early-stage aging. − More importantly, all of the present techniques failed to give a three-dimensional evaluation on polymer aging. − Therefore, it is highly desired to develop a sensitive and multidimensional evaluation strategy for the early-stage identification for polymer aging.…”

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

“…Under a long‐term service period, both asphalt and epoxy resin undergo various performance degradations under external environmental factors. These factors involve high temperature, sunlight (principally ultraviolet), oxygen, water, or a combination of these effects 6–11 . Herein, thermal‐oxidative aging affects the performance of EA binder, specifically increased modulus, reduced phase angle, and agglomeration of asphalt part 12–14 .…”

Evaluation of ethylene–acrylic acid copolymer (EAA)-modified asphalt: Fundamental investigations on mechanical and rheological properties

“…At present, several additives are used in asphalt modification such as crumb tyre rubber(CR) [2][3][4], styrene-butadiene-styrene block copolymer (SBS) [5][6][7][8][9][10][11][12][13][14][15], polyethylene (PE) [16][17][18][19][20][21][22][23][24], styrene-butadiene rubber (SBR) [25,26], polyethylene glycol terephthalate (PET) [27][28][29], biomass [30,31] asphalt [32]. The results found that the softening point increased accordingly with the increasing POE.…”