| 摘要 |
It has been determined that certain star polymers which contain isopropenylnaphthalene or vinylnaphthalene have particular utility as thermoplastic elastomers for molding applications and in adhesive compositions. For instance, these star polymers have outstanding strength at elevated temperatures. This invention more specifically relates to a block polymer having the star-shaped, asymmetrical structure: (A-B @@@Y wherein A is a polymer block which is comprised of repeat units which are derived from a member selected from the group consisting of isopropenylnaphthalene and vinylnaphthalene; wherein B is a polymer block which is comprised of repeat units which are derived from at least one conjugated diolefin monomer; wherein Y is the residue of at least one multivinylaromatic coupling agent; and wherein x is an integer from 2 to about 20. |
