Porous polymer materials are important given their use in a wide variety of applications, for example detection of pollutants in the environment or security sensing of explosive or noxious gases. The porous polymeric material of interest for this particular work is known commercially as Tenax TA. It is produced by the addition of a pore creating solvent to a polymer solution, causing separation and crystallisation of a highly porous polymer matrix. This material is already widely used in air collection of volatile organic compounds (VOCS) by the Health & Safety Laboratory (UK), however it is currently limited by its relatively low surface area and inability to adsorb molecules below a certain size. We aim to understand the mechanism by which these pores are introduced and, through this understanding, design new polymer materials of a prescribed pore size, shape and connectivity.