Journal
ACS MACRO LETTERS
Volume 5, Issue 2, Pages 253-257Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.5b00910
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Funding
- NSF [CHE-1455136, CHE-0130903, CHE-1039870]
- U.S. Department of Energy's National Energy Technology Laboratory [DE-FE0004000]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1455136] Funding Source: National Science Foundation
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A tetrakis(dialkylamino)phosphonium cation ([P-(NR2)(4)](+)) was appended to a styrenic monomer and explored in reversible addition-fragmentation chain transfer polymerization (RAFT) to conduct random copolymerizations of the cationic monomer with styrene. Well-defined polyelectrolytes with molecular weights up to similar to 30 100 and dispersities between similar to 1.2 and 1.4 were obtained. Up to 18.9 mol % of the ionic monomer could be incorporated into the polymer with hexafluorophosphate or bis(trifluoromethane)sulfonimide acting as the counterion during polymerization. Differential scanning calorimetry of the hexafluorophosphate polymers revealed glass transition temperatures higher than polystyrene likely due to interactions between the anion and the polymer. Thermogravimetric analysis indicated these materials have high thermal stability with decomposition temperatures approaching 400 degrees C.
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