Preparation and Properties of Asphalt Modified with a Composite Composed of Waste Package Poly(vinyl chloride) and Organic Montmorillonite

• Nanocomposites composed of WPVC and OMMT were prepared by coextrusion.
• Exfoliating of OMMT facilitates the insertion of the asphalt and PVC molecules into it.
• Exfoliating of OMMT and swelling of WPVC promote dispersion of PVC.
• Low OMMT content results in better properties of modified asphalt.

A composite composed of waste package poly(vinyl chloride) (WPVC) and organic montmorillonite (OMMT) was prepared by coextrusion, which is used for modifying asphalt. The micromorphology of the WPVC/OMMT composite and its effect on the macroscopic properties of asphalt were studied using a fluorescent microscope and an X-ray diffractometer (XRD). The introduction of OMMT allows the WPVC to be good dispersed in the asphalt matrix, as demonstrated by differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) analysis. The results indicate that asphalt modified by WPVC/OMMT composites with low OMMT content results in better high-temperature storage stability and physical properties of modified asphalt.

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