POLY 277 |
| A novel series of AB diblock and ABA triblock copolymers (A = polyisobutylene (PIB), B= poly(vinylferrocene) (PVFe)) has been synthesized by efficient coupling reactions between living PVFe anions and highly reactive chlorosilyl mono- or di-functional PIBs that were successfully prepared via hydrosilation of the corresponding allyl functional PIBs using Karstedt's Pt(0) catalyst. The coupling efficiencies were excellent (> 95%) in all cases. The block copolymers synthesized possess predictable molecular weights, narrow molecular weight distributions, and compositional homogeneities as confirmed by GPC-MALLS and 1H NMR analyses. The two glass transition temperatures of PVFe-b-PIB-b-PVFe ABA triblock copolymer at –65 and 198 °C observed from DSC thermogram suggest microphase separated morphology.
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Metal-Containing and Metallo-Supramolecular Polymers and Materials
1:00 PM-4:45 PM, Monday, August 20, 2007 Westin Boston Waterfront -- Stone, Oral
Division of Polymer Chemistry |