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Journal of Composite Materials
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0021998309345346v1
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Expanded Waste Ground Rubber Tire Powder/Polypropylene Composites: Processing-Structure Relationships

Zhen Xiang Xin

School of Nano and Advanced Materials Engineering, Gyeongsang National University, Gyeongnam, Jinju, 660-701, South Korea, Key Laboratory of Rubber-Plastics (Qingdao University of Science and Technology) Ministry of Education, Qingdao, 266042, People's Republic of China

Zhen Xiu Zhang

School of Nano and Advanced Materials Engineering, Gyeongsang National University, Gyeongnam, Jinju, 660-701, South Korea

Bao Sheng Zhang

Key Laboratory of Rubber-Plastics (Qingdao University of Science and Technology) Ministry of Education, Qingdao, 266042, People's Republic of China

Kaushik Pal

School of Nano and Advanced Materials Engineering, Gyeongsang National University, Gyeongnam, Jinju, 660-701, South Korea

Xu Deng

School of Nano and Advanced Materials Engineering, Gyeongsang National University, Gyeongnam, Jinju, 660-701, South Korea

Sung Hyo Lee

Department of Chemical Engineering, Queen's University, Kingston ON K7L 3N6, Canada

Jin Kuk Kim

School of Nano and Advanced Materials Engineering, Gyeongsang National University, Gyeongnam, Jinju, 660-701, South Korea, rubber{at}gnu.ac.kr

The usage of waste tire powder as dispersed phase in polypropylene matrix offers an interesting opportunity for recycling of the waste tire. In order to obtain ‘value added products’ from polypropylene (PP)/waste ground rubber tire powder (WGRT) composites, in this study, the processing of foamedPP/WGRT composites was investigated using a single-screw foam extrusion setup and chemical blowing agent. The regression models were constructed to study the relationships between the foam structure (i.e., void fraction, average cell size, and cell density) of foamed PP/WGRT composites, the processing conditions (extruder’s die temperature and screw speed), and the formulation compositions (WGRT content and blowing agent concentration) by applying a four-factor central composite design (CCD) statistical approach. The response surface plots generated using the regression models allow the rapid selection of the proper process parameters to obtain PP/WGRT composite foams with the desired density and morphology.

Key Words: polypropylene • waste ground rubber tire powder • central composite design • extrusion foaming • chemical blowing agent.

This version was published on November 1, 2009

Journal of Composite Materials, Vol. 43, No. 24, 3003-3015 (2009)
DOI: 10.1177/0021998309345346
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