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The glass transition temperature of poly(phenylene sulfide) with various crystallinities

Authors

  • Ri-Chao Zhang,

    1. Institute of Process Equipment, Department of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, People's Republic of China
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  • Rong Li,

    1. Institute of Process Equipment, Department of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, People's Republic of China
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  • Ai Lu,

    Corresponding author
    1. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, People's Republic of China
    • Institute of Process Equipment, Department of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, People's Republic of China
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  • Zhijiang Jin,

    1. Institute of Process Equipment, Department of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, People's Republic of China
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  • Baoqing Liu,

    1. Institute of Process Equipment, Department of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, People's Republic of China
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  • Zhongbin Xu

    Corresponding author
    • Institute of Process Equipment, Department of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, People's Republic of China
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Correspondence to: Ai Lu, Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, People's Republic of China. E-mail: ai_lu@tom.com

Zhongbin Xu, Institute of Process Equipment, Department of Chemical Engineering and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, People's Republic of China. E-mail: xuzhongbin@zju.edu.cn

Abstract

The glass transition temperature (Tg) of poly(phenylene sulfide) (PPS) with various crystalline fractions has been studied using dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). The DSC measurements show that Tg can be observed from the heating curves for the PPS sample with very low crystallinity, and no Tg is observed when the crystallinity is over 8%. DMA indicates that crystallinity has an important effect on molecular chain segment motion of PPS. When the crystallinity, Xc, of PPS is over 38%, there is only one chain segment motion, which mainly results from the crystalline chain vibration; while three different chain segment motions occur for PPS samples with lower crystallinity (Xc < 26%), which are amorphous chain segment motion, crystalline chain segment motion and constrained amorphous chain segment motion. Tg of PPS is mainly caused by the amorphous chain segment motion which is independent of the crystallinity, while the relaxation temperature corresponding to crystalline chain motion shifts to lower temperature as the crystallinity increases. The reduction of the relaxation temperature can be attributed to the disorder-order transition of amorphous chains for PPS with lower crystallinity. © 2012 Society of Chemical Industry

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