Enhancing Reinforcement Effects of Polymers in Asphalt: An Applied Approach to Solid Waste Disposal

Daly, William H.; Qiu, Zhaoyao; Youngblood, Jeffrey P.

doi:10.1007/978-3-642-78759-1_32

Cited by 6 publications

(1 citation statement)

References 4 publications

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“…However, they do not produce thermodynamically stable blends, and phase separation is commonly observed during asphalt storing conditions (160°C) 9. One of the several approaches that have been used to address the compatibility problem is chemical modification of the polymer in order to create some interactions between the polymer and the asphalt 9–15…”

Section: Introductionmentioning

confidence: 99%

Use of rheological compatibility criteria to study SBS modified asphalts

Müller

Rodriguez

2003

J of Applied Polymer Sci

133

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Polymer-modified asphalts (PMAs) were prepared using Bachaquero asphalt and styrene-butadienestyrene (SBS) type copolymers. Their rheological behavior was compared to that of unmodified asphalt and of a compatible commercial PMA. Materials were submitted to frequency sweeps between 10 Ϫ1 and 10 2 rad/s from 0 to 50°C. Storage stability tests were performed for 72 h at 160°C. Ring and ball softening points from the top and the bottom of the blends were compared and were used along with fluorescence microscopy to evaluate stability. Samples prepared with styrene-ethylene-butylene-styrene (SEBS) showed improved compatibility and stability as compared with SBSmodified asphalts, probably because of a higher stability to thermal degradation from the absence of double bonds. An additional improvement in stability and compatibility was observed for SEBS functionalized with maleic anhydride (SEBS-g-MAH)-modified blends. Better compatibility, however, did not improve rheological behavior at low temperatures. The systems studied are so complex from a chemical point of view that the rheological criteria normally used to predict compatibility of polyblends did not give enough information regarding the compatibility of the modified asphalts.

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Section: Introductionmentioning

confidence: 99%