6533b857fe1ef96bd12b38c5
RESEARCH PRODUCT
Multihydroxyl-Functional Polystyrenes in Continuous Flow
Holger FreyHolger LöweDaniel WilmsElena Berger-nicolettiMichael MaskosMichael MaskosChristoph TonhauserFrederik R. Wurmsubject
chemistry.chemical_classificationPolymers and PlasticsOrganic ChemistryEpoxidePolymerStyreneInorganic Chemistrychemistry.chemical_compoundEnd-groupAnionic addition polymerizationPolymerizationchemistryPolymer chemistryMaterials ChemistryAlkoxy groupOrganic chemistryLiving anionic polymerizationdescription
We describe the synthesis of end-functionalized polystyrenes by living anionic polymerization in a microstructured reactor via termination by acetal-protected functional epoxides. Initiation of styrene polymerization by alkyllithium takes place in a micromixing device with efficient heat and mass transfer properties. A newly developed continuous polymerization−termination sequence enabled quantitative functionalization of the living carbanions by nucleophilic displacement with different, specifically designed glycidyl ethers (ethoxy ethyl glycidyl ether (EEGE), 1,2-isopropylidene glyceryl glycidyl ether (IGG), and trans-2-phenyl-1,3-dioxane glycidyl ether (PDGE)). Upon acidic hydrolysis the end-capped polystyrenes release multiple hydroxyl groups (2−3) at the chain end. Temperature and flow rates have been varied to control molecular weights and to optimize the reaction conditions for maximum polymerization and termination efficiency. The polymers were analyzed in detail using NMR spectroscopy, size exclu...
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-05-28 | Macromolecules |