Sulfonated polyisobutylene telechelic ionomers |
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| Authors: | Martin R Tant Garth L Wilkes Robson Storey Joseph P Kennedy |
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| Affiliation: | (1) Department of Chemical Engineering and Polymer Materials and Interfaces Laboratory, Virginia Polytechnic Institute and State University, 24061-6496 Blacksburg, VA, USA;(2) Institute of Polymer Science, The University of Akron, 44325 Akron, OH, USA;(3) Present address: Department of Polymer Science, University of Southern Mississippi, Southern Station, Box 10076, 39406-0076 Hattiesburg, MS, USA |
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| Abstract: | The gelation of polyisobutylene-based model ionomers with-S03
–K+ terminal groups has been studied in hexane at 25°C. Both molecular architecture and molecular weight were found to significantly influence the concentration at which gelation occurs. Specifically, three-arm star trifunctional ionomers gel at lower concentrations than linear difunctional ionomers of similar molecular weight. In addition, the gelation concentration decreases with increasing molecular weight for the three-arm star trifunctional ionomer, but the results do not fit the relationship reported previously which relates gelation concentration and molecular weight for carboxylated linear telechelic polymers. |
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