6533b836fe1ef96bd12a086a
RESEARCH PRODUCT
High molecular arborescent polyoxyethylene with hydroxyl containing shell
Barbara TrzebickaAndrzej DworakAndrzej DworakJustyna JustynskaJustyna JustynskaWojciech Wałachsubject
Materials scienceMolar massPolymers and PlasticsEthylene oxideOrganic ChemistrySize-exclusion chromatographyArborescentBranching (polymer chemistry)chemistry.chemical_compoundEnd-groupchemistryPolymer chemistryMaterials ChemistryCopolymerMolar mass distributiondescription
Abstract Arborescent polyoxyethylene of high molar mass (2×10 5 g/mol) and narrow molar mass distribution was synthesized in a three-stage process. In the first stage a triblock copolymer of ethylene oxide (central block, DP ca. 90) and 2,3-epoxypropanol-1 (short flanking blocks, DP ca. 5) was synthesized. The potassium alcoholate derived from this copolymer was used to initiate the polymerization of ethylene oxide and the subsequent addition of protected glycidol (1-etoxyethyl glycidyl ether). After deprotection the short polyglycidol blocks were used as branching units for the next generation. Repeated step by step process leads to the ‘pom-pom like’ branched polyoxyethylene macromolecules enriched with the reactive hydroxyl groups in the outer shell. The branched structure of the obtained polymers was evidenced by the size exclusion chromatography and NMR spectroscopy.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-03-01 | Polymer |