Abstract
The gelation and curing process of urushiol and MDI system were studied by dynamic rheology. Rheometer was used to monitor the changes of rheological parameters (storage modulus G', loss modulus G", complex viscosity η* and loss tangent tanδ) during continuous heating, isothermal aging and high-frequency heat treatment. And track the gelation and structural evolution of the curing process system. The results showed that the combination of isothermal aging, heating and high frequency were expected to be a simple strategy for low temperature curing or shortening the curing time of resin. The conversion α of the curing process was described by the evolution of storage modulus G'. The curing process can be described by autocatalytic model, and the fitting data are in good agreement with the experimental data. The model can be used for process optimization and further development of urushiol based materials.
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