| http://www.w3.org/ns/prov#value | - The polymer matrix (a) includes a polymer chain having at least a segment represented by the following general formula (1): wherein R1 and R2 are, respectively, H or an alkyl group of 2 or less carbon atoms, A is a group having at least a polyether group, and R3 is a group having at least an alkyl group of more than 6 carbon atoms.
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