6533b85ffe1ef96bd12c1a02
RESEARCH PRODUCT
Diffusion of spherical micronetworks in polymer diluent systems and melts studied by dynamic light scattering techniques
Hans SillescuFalk RenthVolker FrenzEckhard Bartschsubject
chemistry.chemical_classificationMaterials sciencePolymers and PlasticsDiffusionOrganic ChemistryPolymerCondensed Matter PhysicsDiluentColloidchemistry.chemical_compoundDynamic light scatteringchemistryChemical physicsPolymer chemistryVolume fractionMaterials ChemistryPolystyreneGlass transitiondescription
Spherical polystyrene (PS) micronetworks can be prepared in microemulsion with bulk radii of 5–60 nm and different cross-linking densities. The diffusion of these PS spheres has been studied in polymer diluent systems ranging from dilute solutions to plasticized melts by using forced Rayleigh scattering and photon correlation spectroscopy. On increasing the PS concentration, a colloid glass transition is observed at a volume fraction ΦC ≈ 0.64 of the swollen spheres. At higher concentration inside the “colloid glass” state the sphere diffusion is slowed down and becomes very complex but can be observed up to the limit of a melt of collapsed spheres.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-03-01 | Macromolecular Symposia |