Static and dynamic light scattering of poly-(α-methyl styrene) in toluene in the dilute region
| Autor: | Gary Patterson, D. J. Ramsay, J. C. Selser, S. H. Kim |
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| Rok vydání: | 1990 |
| Předmět: |
Polymers and Plastics
Scattering Chemistry Analytical chemistry Condensed Matter Physics Light scattering Exponential function Scattering amplitude symbols.namesake Virial coefficient Dynamic light scattering Materials Chemistry Radius of gyration symbols Debye function Physics::Chemical Physics Physical and Theoretical Chemistry |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 28:2023-2056 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.1990.090281111 |
| Popis: | The scattered intensity function S(q, c) and the intermediate scattering function S(q, c, τ) of poly-(α-methyl styrene) (Mω = 5.71 × 105, 1.17 × 106, and 2.96 × 106) in toluene in the dilute concentration region were measured as functions of concentration and scattering vector q. In infinitely dilute solution, the intensity function S(q, 0) agrees well with the Debye function for u 1, S(q, c, τ) is nonexponential, and when analyzed with a discrete inversion method, yields a bimodal distribution of decay rates. Both components are well represented as single exponential decays. D0 can be obtained from the slower component. The decay rate of the faster component is a continuous function of u and approaches q2 dependence at high u. |
| Databáze: | OpenAIRE |
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