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Cationic polymerization of cyclohexyl vinyl ether within MCM-41 channels
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2000
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Materials ScienceMolecular SieveChemical EngineeringEngineeringPolymer HybridMcm-41 ChannelsPolymer ScienceSiliceous Molecular SievesOrganic ChemistryCyclohexyl Vinyl EtherChemistryPolymerization KineticsCationic PolymerizationHybrid MaterialsPolymer ReactionPolymer ChemistryPolymer SynthesisOrganic-inorganic Hybrid Material
Cationic polymerization of cyclohexyl vinyl ether (CHVE) within mesoporous, siliceous molecular sieves (MCM-41) yields novel MCM-41-polyCHVE host-guest hybrid materials. Initiation within the channel can be achieved by triphenylmethylium or bis(4-methoxyphenyl)methylium silanolate ion pairs, as well as by mobile acidic silanols to a certain extent. Generation of the carbenium ions on MCM-41 is investigated by a special UV/VIS technique. The structure of poly(vinyl ether) generated within the channels of MCM-41 depends on the mechanism of initiation as shown by means of solid state 13C{1H} and 29Si{1H} CP MAS NMR spectroscopy.