Effect of the polypropylene type on polymer–diluent phase diagrams and membrane structure in membranes formed via the TIPS processPart I. Metallocene and Ziegler–Natta polypropylenes

Effect of the polypropylene type on polymer–diluent phase diagrams and membrane structure in membranes formed via the TIPS processPart II. Syndiotactic and isotactic polypropylenes produced using metallocene catalysts

“…The equipment and procedure used to obtain the phase diagram and monitor the droplet growth process are presented in detail elsewhere [12,13]. The TIPS process was used to prepare the membranes [14][15][16].…”

“…To quantify the compatibility through the interaction parameter "χ", the method used earlier was repeated [12]. Fig.…”

Propylene/1‐Hexene Copolymer as a Tailor‐Made Poly(propylene) for Membrane Preparation via the Thermally Induced Phase Separation (TIPS) Process

“…[19] The melting temperature and dynamic crystallization temperatures of the polymer in the polymeric solution were determined calorimetrically using a Modulated TA Instruments DSC 290 Differential Scanning Calorimeter. To obtain the dynamic crystallization temperature, polymer-diluent samples were loaded and sealed into capillary tubes, as described above.…”

“…[19,20] The present paper reports the synthesis of tailor-made poly(propylene)s and the effect of the comonomer content (1-hexene) on the isotactic poly (propylene) main chain, the polymer-diluent phase diagram, the pore formation kinetics during membrane preparation and the final morphology of the membrane.…”

Syndiotactic polypropylene as potential material for the preparation of porous membranes via thermally induced phase separation (TIPS) process

“…The thermally induced phase separation (TIPS) process was used to prepare the flat sheet membranes, this procedure is described in several previous reports [9,[22][23][24][25]. Briefly, sPP or iPP and DPE (PP nominal concentration at 20, 15 and 13 wt%) were filled in a test tube, which was purged with nitrogen and sealed to prevent the oxidation.…”