Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends

Qingchun Fan; Feihong Duan; Huaibing Guo; Tian Wu

doi:10.1016/j.cjche.2014.11.016

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Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends

材料与产品工程 | Updated：2026-01-06

- Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends
- Chinese Journal of Chemical Engineering Vol. 23, Issue 2, Pages: 441-445(2015)
- Affiliations：
  
  Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor& Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology,Wuhan,China,430074
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.11.016
  CLC：
- Published：2015
- Accepted：
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Qingchun Fan, Feihong Duan, Huaibing Guo, Tian Wu. Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends[J]. , 2015, 23(2): 441-445.
DOI：

Qingchun Fan, Feihong Duan, Huaibing Guo, Tian Wu. Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends[J]. , 2015, 23(2): 441-445. DOI： 10.1016/j.cjche.2014.11.016.

摘要

Abstract

Polypropylene (PP)with different contents of the second generation hyperbranched polyester (HBP) is prepared by melt blending method. The non-isothermal crystallization kinetics of PP and PP/HBP blends is investigated under differential scanning calorimetry (DSC). The Mo equation is used to analyze the DSC data. The results showthat theMo theory is suitable for crystallization kinetics of the blends. Fast cooling rate is not good for crystallizing and nucleating. The values of half crystallization time (

1/2

)

crystallization enthalpy (Δ

) and temperature range (Δ

) of PP/HBP blends decrease when HBP is added. The required cooling rate of PP is higher than that of PP/HBP blends in order to reach the same relative crystallinity. Crystallization rate increases with the addition of HBP. The crystallization rate reaches a maximumwhen the content of HBP is 5%. In addition

the activation energies of PP and PP/HBP blends are calculated by Kissinger equation

revealing that the content of HBP has a little effect on the crystallization activation energy.

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