Thermal stability and non-isothermal crystallization kinetics of metallocene poly (ethylene-butene-hexene) /high fluid polypropylene copolymer blends

Jingyi Wang, Hongbing Jia*, Yingying Tang, Xiaogang Xiong, Lifeng Ding

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

High-fluidity polypropylene (HF-PP) was melt blended with different amount of metallocene poly (ethylene-butene-hexene) copolymer (mEBHC) using a twin-screw extruder. The thermal degradation and non-isothermal crystallization behavior of the blends were investigated using thermo-gravimetric analysis (TGA) and differential scanning calorimeter (DSC). Our investigation revealed that the thermal degradation activation energies of mEBHC/HF-PP blends, calculated from thermo-gravimetric data by Kissinger, Flynn-Wall-Ozawa and Friedman method, increased with the amount of mEBHC added. Therefore, the thermal stability of mEBHC/HF-PP blends was enhanced in comparison to pure HF-PP. Modified Avrami and Mo models and Hoffman-Lauritzen theory were used to evaluate the influence of mEBHC on the non-isothermal crystallization kinetics of HF-PP. The results showed that mEBHC acted as heterogeneous nucleation agent, the non-isothermal crystallization rate of HF-PP matrix was improved by adding mEBHC.

Original languageEnglish
Pages (from-to)55-61
Number of pages7
JournalThermochimica Acta
Volume647
DOIs
Publication statusPublished - 10 Jan 2017

Keywords

  • HF-PP blends
  • High-fluidity polypropylene
  • Non-isothermal crystallization kinetics
  • Thermal stability

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