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Synthesis and characterization of amphiphilic polyisobutylene/poly(ethylene glycol) di- and triblock copolymers

1. Synthesis of di- and triblock copolymers

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Summary

Di- and triblock copolymers of polyisobutylene PIB and poly(ethylene glycol) PEG have been prepared and characterized. The syntheses involved the capping with tolylene 2,4-diisocyanate TDI various molecular weight α-phenyl-ω-(p-phenol) polyisobutylenes C6H5-PIB-C6H4OH and α,ω-di-(p-phenol)polyisobutylenes HOC6H4-PIB-C6H4OH, or commercially available mono- and di-hydroxyl-terminated PEGs. In this manner a series of PIB-b-PEG diblock copolymers, and PEG-b-PIB-b-PEG and PIB-b-PEG-b-PIB triblock copolymers have been obtained. The complete removal of the prepolymers from these amphiphilic sequential copolymers by conventional solvent extraction techniques could not be achieved because of the very high emulsifying action of the latters. In contrast, satisfactory separation was obtained by column chromatography using mixed (polar/nonpolar) eluents. The blocking efficiencies and composition of the block copolymers have been determined.

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Authors and Affiliations

  1. Institute of Polymer Science, The University of Akron, 44325, Akron, Ohio, USA

    Joseph P. Kennedy & Yuji Hongu

Authors
  1. Joseph P. Kennedy
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  2. Yuji Hongu
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Additional information

Part XL V of the Series on “New Telechelic Polymers and Sequential Copolymers by Polyfunctional Initiator-Transfer Agents (Inifers)”.

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Kennedy, J.P., Hongu, Y. Synthesis and characterization of amphiphilic polyisobutylene/poly(ethylene glycol) di- and triblock copolymers. Polymer Bulletin 13, 115–121 (1985). https://doi.org/10.1007/BF00254219

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  • DOI: https://doi.org/10.1007/BF00254219

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