Gas Permeability of Tailored Phosphazene Polymer Blends

Polyphosphazenes are polymers that consist of organic pendant groups attached to an inorganic phosphorous nitrogen backbone. The inorganic backbone provides these materials with good chemical and mechanical stability. In addition, phosphazene materials can be tailored to specific applications through their organic component. In past work, phosphazene polymers have been synthesized using a variety of pendant groups with a goal of demonstrating control of solubility and chemical selectivity. In this work separate tailored phosphazene polymers were blended to together to yield polymer blends with the desired combination of high carbon dioxide selectivity over nitrogen and improved mechanical characteristics.