| http://www.w3.org/ns/prov#value | - The ionomer layers can be derived from any direct or grafted ethylene copolymer of an alpha olefin having the formula R???CH???CH2, where R is a radical selected from the class consisting of hydrogen and alkyl radicals having from 1 to 8 carbon atoms and alpha, beta-ethylenically unsaturated carboxylic acid having from 3 to 8 carbon atoms.
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