Rapid FTIR method for quantification of styrene‐butadiene type copolymers in bitumen
Rapid FTIR method for quantification of styrene‐butadiene type copolymers in bitumen
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DOI：
10.1002/1097-4628(20010207)79:6
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发表时间：
2001-02
影响因子：
3
通讯作者：
J. Masson;L. Pelletier;P. Collins
中科院分区：
文献类型：
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作者：
J. Masson;L. Pelletier;P. Collins
研究了5种苯乙烯-丁二烯-苯乙烯（SBS）和苯乙烯（SB）共聚物，包括直链共聚物、支链共聚物和星形共聚物及其与沥青共混物对聚苯乙烯（PS）和聚丁二烯（PB）嵌段的中红外摩尔吸光度。PS和PB嵌段的平均吸光度分别为277和69 L mol−1 cm−1，受S/B比和共聚物结构的影响较小。在沥青存在的情况下，聚合物的PS和PB吸收率分别为242 L mol−1 cm−1和68 L mol−1，这可能是由于共聚物与沥青之间的弱相互作用所致。利用吸光度值计算沥青共混物中sb型共聚物的浓度，精度在10%或更高。该方法可用于探测沥青-共聚物共混物在165℃下的贮存稳定性，测定商品聚合物改性沥青（PMB）中的共聚物浓度，以及评价PMB的耐风化性。©2000 John Wiley & Sons, Inc应用化学学报，2009,31 (2):334 - 341
The mid-IR molar absorptivity for polystyrene (PS) and polybutadiene (PB) blocks were obtained for five styrene-butadiene-styrene (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 the 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 the 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 in storage at 165°C, to determine the copolymer concentration in commercial polymer modified bitumen (PMB), and to assess the resistance of PMB to weathering. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1034–1041, 2001