%0 conference lecture %@ %A Budd, P.M.,McKeown, N.B.,Bader, G.S.,Fritsch, D.,Yampolskii, Y.,Shantarovich, V. %D 2009 %J 238th ACS National Meeting & Exposition, Division of Polymer Chemistry %N %P %T Gas separation membranes from polyimides incorporating spiro-centers %U %X