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 k J / mol to- 53. 60 k J / mol. When the mass fraction of FGNs is 1. 0%,the crystallization activation energy of the composite increases to- 41. 74 k J / mol.
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