%0 Journal Article %J Langmuir %D 1986 %T The Reactivity of Carboxylic Acid and Ester Groups in the Functionalized Interfacial Region of 'Polyethylene Carboxylic Acid' (PE-CO2H) and Derivatives: Differentiation of the Functional Groups into Shallow and Deep Subsets Based on a Comparis %A Holmes-Farley, S.R. %A Whitesides, G. M. %B Langmuir %V 3 %P 62-76 %G eng %L 195 %F 196