Non-isothermal Crystallization Kinetics of Waterborne Polyurethane/functionalized Graphene Nanocomposites

doi:10.11944/j.issn.1000-0518.2015.11.150157

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (11): 1319-1326.DOI: 10.11944/j.issn.1000-0518.2015.11.150157

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Non-isothermal Crystallization Kinetics of Waterborne Polyurethane/functionalized Graphene Nanocomposites

LI Xiaoxuan^a^*(),CHEN Tao^a,WU Shengli^a^b

^aSchool of Chemical Engineering,Hefei University of Technology,Hefei 230009,China
^bAnhui Institute of Food and Drug Control,Hefei 230051,China

Received:2015-04-29 Accepted:2015-08-04 Published:2015-11-02 Online:2015-11-02
Contact: LI Xiaoxuan
Supported by:
Supported by University Natural Science Research Funding Program of Anhui Province(No.KJ2012B141)

Abstract

Abstract:

The non-isothermal crystallization behavior of waterborne polyurethane/functionalized graphene nanocomposites(WPU/FGNs) was studied by differential scanning calorimetry(DSC). The non-isothermal crystallization kinetics of WPU/FGNs was investigated by Ozawa and Mo equations, and the crystallization activation energies were calculated by Kissinger equation. The results show that FGNs can be used as heterogeneous nucleation agent to increase the onset of crystallization temperature, peak temperature and crystallization rate of WPU during non-isothermal crystallization process of WPU/FGNs. Crystallization dimension of the composites increases with the increase of the mass fraction of FGNs. When the mass fraction of FGNs increases to 0.3%, crystallization activation energy of the composite decreases from -47.74 kJ/mol to -53.60 kJ/mol. When the mass fraction of FGNs is 1.0%, the crystallization activation energy of the composite increases to -41.74 kJ/mol.

Key words: functionalized graphene nanocomposites, waterborne polyurethane, non-isothermal crystallization, crystallization kinetics

LI Xiaoxuan, CHEN Tao, WU Shengli. Non-isothermal Crystallization Kinetics of Waterborne Polyurethane/functionalized Graphene Nanocomposites[J]. Chinese Journal of Applied Chemistry, 2015, 32(11): 1319-1326.

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Non-isothermal Crystallization Kinetics of Waterborne Polyurethane/functionalized Graphene Nanocomposites

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