6533b851fe1ef96bd12a8d44
RESEARCH PRODUCT
Quantitative description of temperature induced self-aggregation thermograms determined by differential scanning calorimetry
Leonardo ChiappisiMichael GradzielskiGiuseppe LazzaraStefana Miliotosubject
Ethylene oxideSelf aggregationThermodynamicsSurfaces and InterfacesCondensed Matter PhysicsTemperature inducedLight scatteringchemistry.chemical_compoundDifferential scanning calorimetrychemistryDSC Micelle copolymer calorimetryElectrochemistryCopolymerPhysical chemistryGeneral Materials SciencePropylene oxideAction modelSpectroscopySettore CHIM/02 - Chimica Fisicadescription
A novel thermodynamic approach for the description of differential scanning calorimetry (DSC) experiments on self-aggregating systems is derived and presented. The method is based on a mass action model where temperature dependence of aggregation numbers is considered. The validity of the model was confirmed by describing the aggregation behavior of poly(ethylene oxide)-poly(propylene oxide) block copolymers, which are well-known to exhibit a strong temperature dependence. The quantitative description of the thermograms could be performed without any discrepancy between calorimetric and van 't Hoff enthalpies, and moreover, the aggregation numbers obtained from the best fit of the DSC experiments are in good agreement with those obtained by light scattering experiments corroborating the assumptions done in the derivation of the new model.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 |