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RESEARCH PRODUCT
Continuous polymer fractionation of poly(methyl vinyl ether) and a new Kuhn-Mark-Houwink relation
Bernhard A. WolfAndreas StammerHans-michael Petrisubject
Molar massPolymers and PlasticsIntrinsic viscosityOrganic ChemistryMark–Houwink equationFractionationMethyl vinyl etherCondensed Matter PhysicsSolventchemistry.chemical_compoundchemistryPolymer chemistryMaterials ChemistryPetroleum etherPhysical and Theoretical ChemistryPolymer fractionationdescription
Continuous polymer fractionation (CPF) — a new large-scale method — was applied to the technical poly(methyl vinyl ether) (PVME) using toluence as solvent and petroleum ether as non-solvent. Two different devices served as fractionation apparatus, namely a column packed with glass beads and a set of mixer-settler extractors. Advantages and draw-backs of these devices are discussed. The experiments yielded numerous PVME fractions, varying in molar mass from 22 to 87 kg/mol and in molecular non-uniformity U = (M¯w/Mn) – 1 from 0,25 to 0,41 according to gel-permeation chromatography as compared with ca. U = 1,30 for the starting material. The following Kuhn-Mark-Houwink relation was established for PVME in ethyl methyl ketone at 30°C: [η]/(mL/g) = 2,6 . 10−3M0,86.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-05-01 | Macromolecular Chemistry and Physics |