| http://www.w3.org/ns/prov#value | - represents one or more groups selected from among --COOCH.sub.3, --COOC.sub.2 H.sub.5, --COOC.sub.4 H.sub.9, --COOCH.sub.2 CH(C.sub.2H.sub.5)C.sub.4 H.sub.9, --CN and ##STR2## and n is an integer of 1 or above.The .alpha.-olefin constituting the copolymer (a) includes ethylene, propylene and butene-1, among which ethylene is preferable.
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