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Effect of processing variables on the linear viscoelastic properties of SBS‐oil blends
Author(s) -
Navarro F. J.,
MartínezBoza F. J.,
Partal P.,
Gallegos C.,
Muñoz M. E.,
Areizaga J.,
Areizaga J.,
Santamaría A.
Publication year - 2001
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10917
Subject(s) - materials science , thermoplastic elastomer , copolymer , viscoelasticity , composite material , polymer , styrene , elastomer , phase (matter) , thermoplastic , polymer blend , organic chemistry , chemistry
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 vis‐coelastic 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.