ednarski, M., Shangraw, W. R. and Whitesides, G. M., Carbohyd. Res., 1986, 157, c4-c7. 195. '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 Comp