Polymer (wt. % in NMP) Filler (wt. %) Tg (°C) Matrimid 5218 (10) - 293 Matrimid 5218 (10) zeolite 4A (5) 304 Matrimid 5218 (10) zeolite 4A (10) 305 Matrimid 5218 (10) zeolite 4A (15) 306 Matrimid 5218 (10) CMS (10) 296

Table 1: DSC analysis of prepared pristine and zeolite 4A filled Matrimid 5218 membranes.