prov:value
| - Examples of it include natural rubber, polyester elastomers such as polyethylene including low density polyethylene and high density polyethylene, polypropylene, impact strength modifying polystyrene, polybutadiene, styrene/butadiene copolymer, ethylene/propylene copolymer, ethylene/methyl acrylate copolymer, ethylene/ethyl acrylate copolymer, ethylene/vinyl acetate copolymer, ethylene/glycidyl me
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