Thermodynamic affinity of components and the phase structure of plasticized polymethyl methacrylate-polyvinyl chloride blends

A study has been made of the influence of the thermodynamic affinity of plasticizers to PMMA and PVC affecting their distribution between polymer phases as well as the dispersity of blends and the thermodynamic stability of the plasticized systems. It is shown that plasticizer distribution in polymers is in accordance with their thermodynamic affinity. The addition of a selective plasticizer results in loss of the thermodynamic stability of the system and reduces the degree of dispersity of the polymers.