6533b82afe1ef96bd128b6b0

RESEARCH PRODUCT

Water-Soluble Poly(vinylferrocene)-b-Poly(ethylene oxide) Diblock and Miktoarm Star Polymers

Markus GalleiMarkus MazurowskiMatthias RehahnChristoph TonhauserHolger Frey

subject

chemistry.chemical_classificationPolymers and PlasticsEthylene oxideOrganic ChemistryOxideNuclear magnetic resonance spectroscopyPolymerInorganic Chemistrychemistry.chemical_compoundchemistryPolymerizationHydrogenolysisPolymer chemistryMaterials ChemistryAlkoxy groupCopolymerOrganic chemistry

description

We describe the synthesis of water-soluble diblock and miktoarm star polymers consisting of poly(vinylferrocene) (PVFc) and poly(ethylene oxide) (PEO) blocks. First, end-functionalized poly(vinylferrocene) was generated by end-capping the living carbanionic PVFc chains with benzyl glycidyl ether (BGE) or ethoxy ethyl glycidyl ether (EEGE). Acidic hydrolysis of the EEGE-terminated PVFc partially oxidized the PVFc backbone. However, the dihydroxyl end-functional PVFc was obtained in quantitative yields by hydrogenolysis of the BGE-terminated PVFc. A series of block copolymers and AB2 miktoarm star copolymers was obtained in a second polymerization step, utilizing the respective end-functionalized PVFc as a macroinitiator for the ring-opening polymerization (ROP) of ethylene oxide. All polymers were analyzed in detail, using NMR spectroscopy and size-exclusion chromatography (SEC). Online SEC-viscosimetry as well as MALLS was carried out, confirming the formation of miktoarm structures. Quantitative function...

yearjournalcountryeditionlanguage
2012-04-06Macromolecules
https://doi.org/10.1021/ma3000048