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Macroporous Polyolefin Membranes from Dicyclopentadiene High Internal Phase Emulsions: Preparation and Morphology Tuning
Author(s) -
Kovačič Sebastijan,
PreishuberPflügl Florian,
Slugovc Christian
Publication year - 2014
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201300400
Subject(s) - materials science , membrane , polyolefin , emulsion , dicyclopentadiene , porosity , chemical engineering , polymerization , composite material , curing (chemistry) , polymer chemistry , polymer , layer (electronics) , chemistry , engineering , biochemistry
The curing of 200 μm thick, surfactant‐stabilized water‐in‐dicyclopentadiene high internal phase emulsion films by ring opening metathesis polymerization yielded 140–200 μm thick, open‐cellular macroporous membranes with 81.5 ± 2% porosity. Depending on the support on which high internal phase emulsion (HIPEs) were cast, different polyHIPE membrane surface morphologies ranging from almost closed (on steel) to fully open (on glass) were obtained. At the same time, the interior morphology of the membranes was identical, featuring cavity and window diameters of 7 ± 5 and 1.4 ± 0.6 μm, respectively. The membranes were tough and ductile, as revealed by a Young's modulus of 125 ± 8 MPa and an ultimate strength at break, which occurred at 20 ± 2% elongation and 3.1 MPa. The swelling behavior of the membranes was tested in several solvents and finally the swollen membranes were functionalized by bromination, yielding still ductile membranes of 80.6 ± 1% porosity and bromide loading of 5 mmol g −1 .