Morphological control of porous ethylene-vinyl acetate copolymer membrane obtained from a co-continuous ethylene-vinyl acetate copolymer/poly(epsilon-caprolactone) blend
writer：Wu, Defeng*，Zhang, Jie，Zhou, Weidong，Yao, Zhen，Zhang, Ming，Lin, Dongpo，Wang, Jianghong
keywords：ethylene-vinyl acetate copolymer, poly(ε-caprolactone), blend, porous membrane, co-continuous morphology
source：期刊
specific source：Polymer International
Issue time：2014年
Ethylene-vinyl acetate copolymer (EVA)/poly(ε-caprolactone) (PCL) blend (50/50 w/w) with co-continuous morphology was
prepared via melt mixing for fabricating microporous EVA membrane materials through selective solvent extraction. Shear flow
and quiescent annealing techniques were employed to control co-continuous phase size in the EVA/PCL blend, and the timeand
temperature-dependent relations of phase size were then evaluated theoretically. Using these techniques, microporous
EVA membrane materials with various pore sizes ranging from 2 μm to more than 200 μm were obtained. In contrast to the
porous EVA membrane prepared by the traditional way of solvent casting/particulate leaching, the as-obtained microporous
membrane shows a higher level of interconnectivity and much narrower pore size distribution with uniform pore structure.
c 2013 Society of Chemical Industry