6533b870fe1ef96bd12cfaa0
RESEARCH PRODUCT
Interdiffusion in blends of polystyrene and polymethylstyrene studied by light scattering after temperature jumps across the phase boundary
Hans SillescuM. Bestsubject
Phase boundaryPolymers and PlasticsChemistrySpinodal decompositionDiffusionOrganic ChemistryThermodynamicsLight scatteringchemistry.chemical_compoundUpper critical solution temperaturePolymer chemistryMaterials ChemistryPolymer blendPolystyreneDissolutiondescription
Abstract We describe a simple light scattering set-up for measuring interdiffusion coefficients D in polymer blends by generating spinodal decomposition and subsequent dissolution after temperature jumps across the phase boundary. In blends of polystyrene and polymethylstyrene (random copolymer of 60% m-methylstyrene and 40% p-methylstyrene) D values were obtained between 10−11 and 10−15 cm2s−1 at temperatures up to 50 K above the upper critical solution temperature. The results are discussed in relation to tracer diffusion in the same system.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-01-01 | Polymer |