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Synergistic nucleation effect of calcium sulfate whisker and β-nucleating agent dicyclohexyl-terephthalamide in isotactic polypropylene

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Abstract

The crystallization and melting behaviors and mechanical properties of isotactic polypropylene (iPP) containing a certain amount of stearic acid-modified calcium sulfate whiskers (S-CSW) and dicyclohexyl-terephthalamide (TMB-5) were investigated. The results revealed that S-CSW and TMB-5 had obvious synergistic nucleation effect in iPP. At the optimum addition concentration, the crystallization peak temperature of nucleated iPP increased by 8.1 °C compared with that of pure iPP, and the relative content of β-crystals in iPP reached to 0.9012. The impact strength, tensile strength and flexural modulus of iPP increased by approximately 61.8%, 1.71% and 26.1%, respectively, which were obviously better than that of iPP nucleated with S-CSW or TMB-5 independently.

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Acknowledgements

This work was supported by Hunan Provincial Natural Science Foundation of China (No. 2019JJ40294) and the Research Innovation Program for College Graduates of Changsha University of Science and Technology (No. CX2018SS17).

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  1. School of Chemistry and Food Engineering, Changsha University of Science and Technology, No. 960, South Wanjiali Road, Changsha, 410114, People’s Republic of China

    Yue-Fei Zhang, Xiang-Feng Lin, Yan Li & Bin He

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Zhang, YF., Lin, XF., Li, Y. et al. Synergistic nucleation effect of calcium sulfate whisker and β-nucleating agent dicyclohexyl-terephthalamide in isotactic polypropylene. J Therm Anal Calorim 139, 343–352 (2020). https://doi.org/10.1007/s10973-019-08424-0

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