6533b7d0fe1ef96bd125a23d
RESEARCH PRODUCT
Molecular parameters of hyperbranched polymers made by self-condensing vinyl polymerization of macroinimers
Peter F. W. SimonAxel H. E. Müllersubject
chemistry.chemical_classificationPolymers and PlasticsOrganic ChemistryHyperbranched polymersDispersityPolymerDegree of polymerizationCondensed Matter PhysicsBranching (polymer chemistry)DilutionInorganic ChemistrychemistryPolymerizationPolymer chemistryMaterials ChemistryCopolymerdescription
The molecular weight averages and the degree of branching, DB, of a hyperbranched polymer obtained by self-condensing vinyl polymerization (SCVP) of a macroinimer A-(m)γ-B* is calculated by modifying the existing equations for SCVP. The polydispersity is lowered by a factor (γ + 1), where γ is the degree of polymerization of the macroinimer. DB decreases with γ, however, at full conversion the DB of the polymacroinimer is approximately 60% higher than expected from the “dilution” of an AB* inimer with linear m units. This is the result of the existence of a new kind of branched units. The structure of polymacroinimers is similar to the pattern of a highly branched copolymer obtained by self-condensing vinyl copolymerization. However, the polydispersity index and the DB of these two processes are different, for a given molecular weight the polydispersity and the DB of the macroinimer is lower than the corresponding parameters for SCVCP at the same value of γ.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-11-01 | Macromolecular Theory and Simulations |