| http://www.w3.org/ns/prov#value | - re positive integers, and polystyrene A and A' endblocks represented by the formula: ##STR3## where n is a positive integer, which may be the same or different for A and A', are sometimes referred to as S-EB-S (polystyrene/poly(ethylene-butylene)/polystyrene) block copolymers, are available under the trademark KRATON G, for example, KRATON G 1650, KRATON G 1652 and KRATON GX 1657 from Shell Chemic
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