Effects of processing parameters on the properties of microwave-devulcanized ground tire rubber/polyethylene dynamically revulcanized blends

Author(s)

Bastos de Sousa, Fabiula Danielli ^{[1, 2]} ; Scuracchio, Carlos Henrique ^[3] ; Hu, Guo-Hua ^[2] ; Hoppe, Sandrine ^[2]

Affiliation

^[1] Univ Fed Pelotas UFPel, Technol Dev Ctr CDTec, Rua Felix Cunha 809, BR-96010000 Centro, RS - Brazil

^[2] Univ Lorraine, LRGP, CNRS, 1 Rue Grandville, BP20451, F-54001 Nancy - France

^[3] Univ Fed Sao Carlos UFSCar, Mat Engn Dept DEMa, Washington Luis SP-310, Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Journal of Applied Polymer Science; v. 133, n. 23 JUN 15 2016.
• Web of Science Citations: 8

Abstract

This work aimed to evaluate the effects of processing parameters on properties of dynamically revulcanized blends based on 60 wt % of devulcanized ground tire rubber (GTR) and 40 wt % of high density polyethylene (HDPE). Devulcanization of the GTR was carried out in a system comprised of a conventional microwave oven adapted with a motorized stirring system with speed control. The resulting devulcanized GTR contained 26 wt % soluble in toluene. It was processed with HDPE in a twin screw extruder to produce a dynamically revulcanized blend. Processing parameters such as screw speed and feeding mode were varied. Their effects were evaluated based on tensile, dynamic mechanical, thermal and rheological properties, as well as on morphology. The results show the importance of the processing parameters involved in the production of blends with dynamically revulcanized rubber phase in the extruder, and good match between the residence time of the rubber and its revulcanization kinetics. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43503. (AU)

• FAPESP's process: 10/15799-6 - Study and characterization of the blends and nanocomposites with recycled rubber
• Grantee: Carlos Henrique Scuracchio
• Support type: Regular Research Grants