6533b7ddfe1ef96bd1273d1f
RESEARCH PRODUCT
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K. SchultesGerhard WegnerWolfgang H. MeyerBernhard A. Wolfsubject
Molar massTetrafluoroboratePolymers and PlasticsGeneral Chemical EngineeringAnalytical chemistryFractionationPolyelectrolyteGel permeation chromatographychemistry.chemical_compoundDifferential scanning calorimetrychemistryBromideOrganic chemistryGlass transitiondescription
About 340 g of a cycloaliphatic ionene (see formula given in the introduction) were fractionated by a continuous countercurrent extraction method (CPF). The efficiency of the separation was checked by viscometry and gel permeation chromatography (GPC). Ten different fractions with number average molecular masses between 16 000 and 29 000 D were obtained and their glass transition temperatures T g determined by differential scanning calorimetry (DSC) for their bromide and tetrafluoroborate salts. No molecular weight dependence of T g was found, in contrast to recently reported results with aliphatic ionenes, where - in case of the bromide - T g increases with rising molecular weight.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-10-01 | Acta Polymerica |