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Polymers 2016, 8(4), 104; doi:10.3390/polym8040104

Anhydrides-Cured Bimodal Rubber-Like Epoxy Asphalt Composites: From Thermosetting to Quasi-Thermosetting

College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Department of Chemistry and Molecular Engineering, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
Jinan Urban Construction Group, Jinan, Shandong 250001, China
Author to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 10 January 2016 / Revised: 16 March 2016 / Accepted: 18 March 2016 / Published: 29 March 2016
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The present engineering practices show the potential that epoxy asphalt composites (EACs) would be a better choice to obtain long life for busy roads. To understand the service performance–related thermorheological properties of prepared bimodal anhydrides-cured rubber-like EACs (REACs), a direct tensile tester, dynamic shear rheometer and mathematical model were used. Tensile tests demonstrate that all the REACs reported here are more flexible than previously reported anhydrides-cured REACs at both 20 and 0 °C. The better flexibility is attributed to the change of bimodal networks, in which cross-linked short chains decreased and cross-linked long chains increased, relatively. Strain sweeps show that all the REACs have linear viscoelastic (LVE) properties when their strains are smaller than 1.0% from −35 to 120 °C. Temperature sweeps illustrate that the thermorheological properties of REACs evolve from thermosetting to quasi-thermosetting with asphalt content, and all the REACs retain solid state and show elastic properties in the experimental temperature range. A Cole–Cole plot and Black diagram indicate that all the REACs are thermorheologically simple materials, and the master curves were constructed and well-fitted by the Generalized Logistic Sigmoidal models. This research provides a facile approach to tune the thermorheological properties of the REACs, and the cheaper quasi-thermosetting REAC facilitates their advanced applications. View Full-Text
Keywords: linear viscoelastic (LVE); modified asphalt; epoxy asphalt; thermorheologically simple; bimodal networks linear viscoelastic (LVE); modified asphalt; epoxy asphalt; thermorheologically simple; bimodal networks

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kang, Y.; Jin, R.; Wu, Q.; Pu, L.; Song, M.; Cheng, J.; Yu, P. Anhydrides-Cured Bimodal Rubber-Like Epoxy Asphalt Composites: From Thermosetting to Quasi-Thermosetting. Polymers 2016, 8, 104.

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