سال انتشار: ۱۳۹۰

محل انتشار: کنفرانس بین المللی فرآورش پلیمرها

تعداد صفحات: ۴

نویسنده(ها):

m Ghatarband – Department of Polymer Engineering, Islamic Azad University, Tehran South Branch
m Ghiass – Iran Polymer and Petrochemical Institute

چکیده:

Understanding the microstructure evolution of a polymer blend system during spinodal decomposition phase separation process is the key knowledge in production, and application of polymer blend materials. The dynamics of spinodal decomposition phase separation has been modeled by solving the fourth order nonlinear Cahn- Hilliard equation using a Galerkin finite element method. The effects of concentration, temperature, and interaction between polymer components as major parameters on the dynamic and late stages of phase separation have been studied. It has been observed that the phase separation at different concentrations and different temperature leads todifferent morphologies mainly as droplet-like and rod-like morphologies each shows different characteristic properties and applications. The model is capable to qualitatively describe and predict the final morphology based on the specified operational variables such as temperature and concentration. The model is also capable of predict and control the morphology of the blend to achieve the specified microstructure for specified application. Different morphologies also have been qualitatively described to understand the effects of processing conditions on the properties of the final products