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HyperMacs to HyperBlocks: A Novel Class of Branched Thermoplastic Elastomer

Hutchings, L.R.; Dodds, J.M.; Rees, D.; Kimani, S.M.; Wu, J.J.; Smith, E.

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Authors

J.M. Dodds

D. Rees

S.M. Kimani

E. Smith



Abstract

We demonstrate here the great versatility of the macromonomer approach for the synthesis of long chain hyperbranched polymers (HyperMacs) and describe the synthesis of HyperMacs from polybutadiene and poly(methyl methacrylate) using analogous yet modified synthetic strategies. Furthermore, we report the synthesis, morphology, and mechanical properties of an entirely new class of HyperMacs—HyperBlocks—prepared from the coupling of polystyrene−polyisoprene−polystyrene triblock copolymer macromonomers. Transmission electron microscopy (TEM) studies show that these unconventional block copolymers undergo microphase separation, but the resulting morphologies lack any long-range order. Tensile testing shows that these materials offer promise as a new class of branched thermoplastic elastomer (TPE). Finally, blends of HyperBlock (10%) with a commercial linear TPE produced by Kraton show both enhanced ultimate tensile stress and elongation at break.

Citation

Hutchings, L., Dodds, J., Rees, D., Kimani, S., Wu, J., & Smith, E. (2009). HyperMacs to HyperBlocks: A Novel Class of Branched Thermoplastic Elastomer. Macromolecules, 42(22), 8675-8687. https://doi.org/10.1021/ma901819f

Journal Article Type Article
Publication Date Nov 24, 2009
Deposit Date Mar 20, 2015
Publicly Available Date Mar 20, 2015
Journal Macromolecules
Print ISSN 0024-9297
Electronic ISSN 1520-5835
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 42
Issue 22
Pages 8675-8687
DOI https://doi.org/10.1021/ma901819f

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © 2009 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/ma901819f.





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