| http://www.w3.org/ns/prov#value | - The aromatic olefins are preferably vinyl aromatic monomers of up to 12 carbon atoms including styrene and substituted styrenes such as the methyl styrenes, alpha-halostyrenes, lower alkyl-substituted styrenes such as alpha-methylstyrene, alpha-ethylstyrene, para-tert-butylstyrene and para-lower alkoxystyrenes.
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