Abstract
Abstract The synthesis of the title star-block thermoplastic elastomers (TPEs) was accomplished by linking living polystyrene-b-polyisobutylene (PSt-b-PIB⊕) diblocks with divinylbenzene. Linking was fast and high yields of star-block polymers were obtained. The products were characterized by a variety of techniques. The physical and processing properties of the star-blocks have been investigated and they were found to exhibit superior tensile properties and lower melt viscosities to those of similar linear triblock copolymers.
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