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Mixing characteristics of different tracers in extrusion of polystyrene and polypropylene

Authors

  • Xian-Ming Zhang,

    Corresponding author
    1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
    • Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China. E-mail: joolizxm@hotmail.com

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  • Shi-Yang Zhu,

    1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
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  • Cai-Liang Zhang,

    1. Department of Chemical and Biochemical Engineering, State Key Laboratory of Chemical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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  • Lian-Fang Feng,

    1. Department of Chemical and Biochemical Engineering, State Key Laboratory of Chemical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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  • Wen-Xing Chen

    1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
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Abstract

To characterize the actual flow behavior of polymer, polystyrene (PS) and polypropylene (PP) macromolecular tracers were synthesized by copolymerization and graft routes. The two tracers were then used to obtain the residence time distribution (RTD) functions of PS and PP in a twin-screw extruder. The effect of temperature on RTD is discussed using different tracers. The mixing characteristics of different tracers in the extrusion of PS and PP were compared by measuring the overall and partial RTDs. The dependence of the overall and partial RTDs on the tracer types was investigated. The effects of mixing intensity, miscibility, and melting difference on the measured distribution were also discussed. POLYM. ENG. SCI., 54:310–316, 2014. © 2013 Society of Plastics Engineers

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