6533b7d4fe1ef96bd1261d8c

RESEARCH PRODUCT

Evidence for chain transfer in the atom transfer radical polymerization of butyl acrylate

Sebastian G. RoosAxel H. E. Müller

subject

chemistry.chemical_classificationPolymers and PlasticsAtom-transfer radical-polymerizationButyl acrylateOrganic ChemistryRadical polymerizationChain transferSolution polymerizationPolymerchemistry.chemical_compoundMonomerchemistryCatalytic chain transferPolymer chemistryMaterials Chemistry

description

Poly(butyl acrylate) (PBuA) of high molecular weight was synthesized by atom transfer radical polymerization (ATRP) in ethyl acetate. Whereas for low molecular weight polymers, a linear increase of the number-average molecular weight. M n , versus conversion and narrow molecular weight distributions indicate the suppression of side reactions, a downward curvature in the plot of M n versus conversion was observed for high molecular weights (M n > 50 000). This effect is explained by chain transfer reactions, leading to branched polymers. GPC measurements with a viscosity detector give evidence for the branched structure of high molecular weight polymers obtained in ATRP. In addition, transfer to solvent or monomer is likely to occur.

yearjournalcountryeditionlanguage
2000-08-01Macromolecular Rapid Communications
https://doi.org/10.1002/1521-3927(20000801)21:12<864::aid-marc864>3.0.co;2-e