| http://www.w3.org/ns/prov#value | - An example is a composition in which 2,2-bis(4,4-di-t-butyl peroxycyclohexyl)propane or 3,3???,4,4???-tetra(t-butyl peroxycarbonyl)benzophenone is added to a block copolymer comprising a 1,2-polybutadiene chain and a polymethyl methacrylate chain by 1 to 5 wt % based on the 1,2-polybutadiene chain.
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