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Coil-stretch transition of dilute flexible polymers under ultrahigh velocity gradients
Abstract
Because the hydrodynamic interactions are reduced by stretching, a solute polymer coil should unwind abruptly when a certain critical value of the velocity gradient is reached. Depending on the details of the velocity field (``longitudinal'', or ``transverse'', or more complex gradients) this coil ↔ stretch transition may be continuous (``second order'') or discontinuous (``first order''). In the latter case hysteresis should often be observed; a qualitative discussion of the associated relaxation times is given. Simple shear flow is an exceptional case, with no sharp transition. Some expected effects of the C↔S transition on the mechanical behavior, on optical properties, and on chemical degradation in flow are briefly analyzed.
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Metadata
- Authors
- De Gennes, P. G.
- Venue
- The Journal of Chemical Physics
- Publisher
- AIP Publishing
- Published
- 1974-06-15
- Volume
- 60
- Issue
- 12
- Pages
- 5030-5042
- ISSN
- 0021-9606 (ISSN-L)
- 1089-7690
- OpenAlex
- W2148849027
- Cited by
- 1,054
- References
- 0
- FWCI
- 3.91
- Type
- journal article
- Language
- en
- Open access
- closed
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- De Gennes, P. G. (1974). Coil-stretch transition of dilute flexible polymers under ultrahigh velocity gradients. The Journal of Chemical Physics. https://doi.org/10.1063/1.1681018
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