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Journal of Thermal Analysis and Calorimetry

, Volume 103, Issue 2, pp 701–710 | Cite as

Crystallization behavior of isotactic polypropylene/magnesium salt whisker composites modified by compatibilizer PP-g-MAH

  • Zhiyong Wei
  • Wanxi Zhang
  • Guangyi Chen
  • Jicai Liang
  • Ying Chang
  • Lian Liu
  • Pei Wang
  • Juncai Sun
Article

Abstract

Crystallization behavior of isotactic polypropylene (iPP)/magnesium salt whisker (MSW) composites modified by compatibilizer PP-g-MAH was studied under both isothermal and nonisothermal conditions. Analysis of the isothermal crystallization showed that the Avrami model successfully described the crystallization process. On the basis of Lauritzen–Hoffman theory, a regime transition was observed at about 139 °C for the iPP/MSW composite, and a decrease in the fold surface free energy was calculated with the addition of MSW and PP-g-MAH. The addition of MSW filler and PP-g-MAH compatibilizer distinctly improved the crystallization temperature and accelerated the total crystallization rate of iPP. It was observed that MSW induced the formation of β-iPP but PP-g-MAH suppressed the formation of β-iPP.

Keywords

Crystallization Isotactic polypropylene Magnesium salt whisker Melting behavior 

Notes

Acknowledgements

The research was financed by the National High Technology Research and Development Program of China (863 Program No. 2009AA03Z319), and the National Natural Science Foundation of China (No. 50901011), and the Fundamental Research Funds for the Central Universities.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2010

Authors and Affiliations

  • Zhiyong Wei
    • 1
  • Wanxi Zhang
    • 1
  • Guangyi Chen
    • 1
  • Jicai Liang
    • 1
  • Ying Chang
    • 1
  • Lian Liu
    • 2
  • Pei Wang
    • 2
  • Juncai Sun
    • 2
  1. 1.School of Automotive EngineeringDalian University of TechnologyDalianChina
  2. 2.School of Transportation and Logistics EngineeringDalian Maritime UniversityDalianChina

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