| http://www.w3.org/ns/prov#value | - ing from 1 to 6, with the proviso that R18, R19, R20 and R21 do not simultaneously represent a hydrogen atom, r and s are identical or different, and are chosen from integers ranging from 1 to 6, q is equal to 0 or to an integer ranging from 1 to 34, X is a halogen atom, and A is a dihalide radical or ???CH2???CH2???O???CH2???CH2???; (12) homopolymers or copolymers derived from acrylic or methacry
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