Rapid FTIR method for quantification of styrene-butadiene type copolymers in bitumen

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DOIResolve DOI: http://doi.org/10.1002/1097-4628(20010207)79:6<1034::AID-APP60>3.3.CO;2-W
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TypeArticle
Journal titleJournal of Applied Polymer Science
Volume79
Issue6
Pages10341041; # of pages: 8
Subjectbitumen, ftir, analysis, modified bitumen, sbs, sb, copolymer, spectroscopy; Roads/Pavement; Roads
AbstractThe mid-infrared molar absorptivity for polystyrene (PS) and polybutadiene (PB) blocks were obtained for five SBS and SB copolymers, including linear, branched and star copolymers, and their blends with bitumen. The average absorptivity for PS and PB blocks was 277 and 69 L·mol-1·cm-1 and it was little affected by the S/B ratio or the copolymer architecture. In presence of bitumen, Beer's law was obeyed but the respective PS and PB absorptivity was 242 and 68 L·mol-1·cm-1, possibly because of weak interactions between copolymer and bitumen. The absorptivity values were used to calculate the concentration of SB-type copolymers in blends with bitumen with an accuracy of 10% or better. The method can be used to probe the stability of bitumen-copolymer blends to storage at 165°C, determine the copolymer concentration in commercial PMB, and assess the resistance of PMB to weathering.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number43151
9641
NPARC number20331266
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Record identifier4e199d3a-b98c-4905-a747-edf019aa3a8e
Record created2012-07-18
Record modified2016-05-09
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