| http://www.w3.org/ns/prov#value | - The aldehyde to be condensed with the polyvinyl alcohol is an aromatic aldehyde, specifically including benzaldehyde; alkyl-substituted benzaldehyde such as 2-methylbenzaldehyde, halogen-substituted benzaldehyde such as chlorobenzaldehyde; phenyl-substituted alkylaldehyde such as phenylacetaldehyde and ??-phenylpropionaldehyde; substituted aromatic aldehyde having a substituent such as hydroxy, al
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