prov:value
| - Vinyl aromatic polymers suitable for purposes of the present invention include expandable polymers, homopolymers and copolymers derived from vinyl aromatic monomers such as styrene, vinyl toluene, isopropyl styrene, alpha-methylstyrene, nuclear dimethyl styrene, t-butyl styrene, bromostyrene, chlorostyrene, vinyl naphthalene, and the like as well as copolymer prepared by polymerizing a vinyl aroma
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