Journal of Polymer Science Part A Polymer Chemistry · 2008 · 82 citations · 55 references
Natural SciencesChemistryMaterials ScienceCatalysisPolymer ChemistryPolymer MaterialsCarbon Dioxide UtilizationCarbon FixationPolymer ProcessingPolymer SynthesisPolymerization ChemistryPolymerization KineticsCarbon DioxideCopolymerizationGlass TransitionGlass Transition TemperaturePolycarbonatePolymerization Of Carbon DioxidePorphyrin ComplexesTurnover Frequency
Abstract Cobalt porphyrin complex (TPPCo III X) (TPP = 5, 10, 15, 20‐Tetraphenyl‐ porphyrin; X = halide) in combination with ionic organic ammonium salt was used for the regio‐specific copolymerization of propylene oxide and carbon dioxide. A turnover frequency of 188 h −1 was achieved after 5 h, and the byproduct propylene carbonate was successfully controlled to below 1%, where the obtained poly(propylene carbonate) (PPC) showed number average molecular weight ( M n ) of 48 kg/mol, head‐to‐tail content of 93%, and carbonate linkage of over 99%. When the polymerization time was prolonged to 24 h, PPC with M n over 115 kg/mol and head‐to‐tail linkage maintaining 90% was prepared, whose glass transition temperature reached 44.5 °C. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 5959–5967, 2008
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On the preparation of metalloporphyrins
Alan D. Adler, Frederick R. Longo, F. J. Kampas et al. · Journal of Inorganic and Nuclear Chemistry · 1970 · 1.8K citations