Changes in microporous structure of polyethylene membrane fabricated from PE/PTMG/paraffin ternary mixtures

► Microporous PE membranes were fabricated via a TIPS process. ► A PTMG mixture with paraffin was used as a novel diluent. ► Phase separation temperature of PE-paraffin-PTMG blend increased up to 270 °C. ► PE membranes with average pore sizes between 0.2 and 12 μm can be produced.