Calculation method for predicting polymer compatibility. Estimation of microphase compositions from glass transition temperatures

摘要

A calculation method for predicting compatibility of two polymers on blending is proposed. The method is based on the criterion of polymer solubility in organic solvents;;the criterion takes into account the chemical structure of both polymer and solvent, surface forces, and the polymer-solvent intermolecular interaction energy. When two polymers are mixed together, one of them is regarded as a "solvent". The applicability of the method to fully compatible, partially compatible, and absolutely incompatible polymers is analyzed. It is shown that the composition of microphases at microphase separation can be approximately calculated using the dynamic mechanical analysis (DMA).