Effect of processing variables on the linear viscoelastic properties of SBS-oil blends

被引:23
作者
Navarro, FJ
Martínez-Boza, FJ
Partal, P
Gallegos, C
Muñoz, ME
Areizaga, J
Santamaría, A
机构
[1] Univ Huelva, Dept Ingn Quim, Escuela Politecn Super, Huelva 21819, Spain
[2] Univ Basque Country, Dept Ciencia & Tecnol Polimeros, E-20080 San Sebastian, Spain
关键词
D O I
10.1002/pen.10917
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Block copolymers, especially styrene-butadiene-styrene three-block copolymers (SBS), are recognized as especially effective asphalt modifiers because of their thermoplastic elastomeric properties. The concentration of copolymer, its ability to swell by the maltenic oils, and the processing variables are essential in the development of a three-dimensional network in the polymer-rich phase that enhances the viscoelastic properties of these modified binders. This swollen polymer phase may influence the mechanical properties of the modified bitumens and synthetic binders. This paper deals with the influences that processing variables exert on the linear viscoelastic properties of oil/SBS mixtures in a wide range of temperatures. From the experimental results obtained we may conclude that most of the oil/SBS blends studied are highly structured thermoplastic gels above a critical SBS concentration that depends upon temperature, time of processing and surrounding atmosphere.
引用
收藏
页码:2216 / 2225
页数:10
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