Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends

doi:10.1016/j.cjche.2014.11.016

›› 2015, Vol. 23 ›› Issue (2): 441-445.DOI: 10.1016/j.cjche.2014.11.016

Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends

Qingchun Fan, Feihong Duan, Huaibing Guo, Tian Wu

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 430074, China

收稿日期:2013-02-26 修回日期:2013-04-25 出版日期:2015-02-28 发布日期:2015-03-01
通讯作者: Qingchun Fan
基金资助:
Supported by the Youths Foundation ofWuhan Institute of Technology(Q200902) and the Graduate Innovative Fund ofWuhan Institute of Technology(CX201101).

Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends

Qingchun Fan, Feihong Duan, Huaibing Guo, Tian Wu

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 430074, China

Received:2013-02-26 Revised:2013-04-25 Online:2015-02-28 Published:2015-03-01
Supported by:
Supported by the Youths Foundation ofWuhan Institute of Technology(Q200902) and the Graduate Innovative Fund ofWuhan Institute of Technology(CX201101).

摘要/Abstract

摘要： 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 (t_1/2), crystallization enthalpy (ΔH_c) and temperature range (ΔT) 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.

关键词: Activation energy, Kinetics, Crystallization rate

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 (t_1/2), crystallization enthalpy (ΔH_c) and temperature range (ΔT) 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.

Key words: Activation energy, Kinetics, Crystallization rate

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

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Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends

Non-isothermal crystallization kinetics of polypropylene and hyperbranched polyester blends

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