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Dynamics of Block Copolymer Micelles
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yurekli, Koray Krishnamoorti, Ramanan |
| Abstract | The structure and melt-state viscoelastic properties for liquidlike ordered micelles, prepared by blending a highly asymmetric polystyrene-rich block copolymer with a polystyrene homopolymer, are examined using a combination of small-angle neutron scattering (SANS), electron microscopy, and dynamic oscillatory rheological measurements. The SANS data, analyzed using a monodisperse Percus-Yevick hard-sphere model, indicated that with homopolymer addition the core diameter remained unchanged while the corona was swollen. The melt viscoelastic data indicated a surprising blend compositionindependent “Newtonian” viscosity for blend compositions ranging from 5 to 50 wt % block copolymer. A simple model for the viscosities accounting for the corona swelling, indicated by SANS, provided reasonable agreement with the experimental data. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.ncnr.nist.gov/programs/sans/pdf/publications/0371.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Alpha compositing Composition Copolymer Core (optical fiber) Corona Diameter (qualifier value) Electron Microscopy Neutrons Non-Small Cell Lung Carcinoma Penile swelling Polymer Polystyrenes Viscosity |
| Content Type | Text |
| Resource Type | Article |
