6533b854fe1ef96bd12ae7eb
RESEARCH PRODUCT
A Facile Two-Step Route to Branched Polyisoprenes via ABn-Macromonomers
Andreas F. M. KilbingerFrancisco-javier López-villanuevaHolger FreyFrederik R. Wurmsubject
chemistry.chemical_classificationPolymers and PlasticsHydrosilylationOrganic ChemistryPolymerBranching (polymer chemistry)Macromonomerchemistry.chemical_compoundEnd-groupAnionic addition polymerizationchemistryPolymerizationPolymer chemistryMaterials ChemistryAddition polymerdescription
A facile two-step synthesis for branched poly(isoprene)s (PI) based on polyaddition of AB n -type macromonomers is described. The synthesis of the macromonomers was achieved by anionic polymerization of isoprene and subsequent end-capping of the polymers by addition of chlorodimethylsilane to the living carbanions. This led to PI-based macromonomers with narrow polydispersity (M w /M n < 1.15) and molecular weights in the range of 1700 -22100 g mol -1 . Synthesis of the branched polymers was carried out by a hydrosilylation-based polymerization of the macromonomers. Characterization via SEC, SEC-MALLS, coupled SEC-viscosimetry and 1 H-NMR-spectroscopy supported the formation of branched structures. Interestingly, these branched polymers exhibited α-values that were similar to those reported for hyperbranched polymers based on AB 2 -monomers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-03-16 | Macromolecular Rapid Communications |