International audienceA series of cross-linked polyether-based 1,2,3-triazolium ion conducting membranes are prepared via the combination of thermally promoted Huisgen 1,3-dipolar cycloaddition of a dialkyne and a diazide poly(trimethylene ether glycol) monomers with in-situ N-alkylation of the resulting poly(1,2,3-triazole)s with varying contents of 1,10-diiododecane as cross-linking agent. The resulting free-standing membranes have T(g)s below -60 degrees C, T(d)s up to 230 degrees C, and Young's modulus up to 4.2 MPa. The overall combined reaction kinetics were studied by DSC yielding an activation energy of 76 kJ/mol by the Kissinger method. These ion conducting membranes have conductivities up to 10(-6) S/cm at 30 degrees C under anhydrous conditions. They have potential to be used in CO2 separation applications as they exhibit CO2 permeability of 59-110 Barrer and CO2/N-2 selectivity of 25-48

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Multiblock copolymers of poly(arylene ether sulfones) (PAESs) and poly(1,4cyclohexylenedimethylene terephthalate) (PCT) were synthesized via melt-phase polymerization. PAES oligomers (M n = 2000 g/mol) were synthesized with hydroxyethoxyl end groups, and then reacted with dimethyl terephthalate (DMT) and 1,4-cyclohexanedimethanol (CHDM) to obtain segmented copolymers with the goal of introducing semi-crystallinity into the PAES segmented block copolymers. Two CHDM (all trans and cis/trans = 30/70) were used for comparison. Weight percentages of PCT segments varied from 20 wt% to 80 wt%. According to the results measured by DSC, DMA and WAXS, the copolymers crystallized when the content of PCT segment was above 50 wt%, and the crystallinity of the copolymers exhibited a proportional dependence on the weight percentage of PCT segments. Segmented copolymers with trans