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Effects of ordered structure on non-isothermal crystallization kinetics and subsequent melting behavior of β-nucleated isotactic polypropylene/graphene oxide composites

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Abstract

In this paper, effects of ordered structure on non-isothermal crystallization kinetics and subsequent melting behavior of β-nucleated isotactic polypropylene/graphene oxide composites were investigated. Under all cooling rates, as fusion temperature Tf stepped into the range of 168–178 °C, the ordered structure survived in the melt, resulting in the increase in crystallization peak temperature Tp, the decrease in crystallization activation energy ΔE and the decrease in the half crystallization time t1/2. When endset temperature of cooling Tend = 50 °C, lower cooling rate encouraged the formation of more β-phase. Moreover, the influence of ordered structure on β-α recrystallization was studied by adjusting the Tend. When Tend = 105 °C, higher cooling rate encouraged the formation of more β-phase. The ordered structure was favorable for the improvement of the thermal stability of the β-phase during β-α recrystallization.

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Acknowledgements

We gratefully acknowledge the National Natural Science Foundation of China (NSFC 51503134, 51421061, 51721091) and the State Key Laboratory of Polymer Materials Engineering (Grant No. SKLPME 2017-3-02) for the financial support.

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Authors and Affiliations

  1. State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, People’s Republic of China

    Yansong Yu, Fangxinyu Zeng, Jinyao Chen, Jian Kang, Feng Yang, Ya Cao & Ming Xiang

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  1. Yansong Yu
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  2. Fangxinyu Zeng
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  4. Jian Kang
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Correspondence to Jian Kang.

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Yu, Y., Zeng, F., Chen, J. et al. Effects of ordered structure on non-isothermal crystallization kinetics and subsequent melting behavior of β-nucleated isotactic polypropylene/graphene oxide composites. J Therm Anal Calorim 136, 1667–1678 (2019). https://doi.org/10.1007/s10973-018-7776-8

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