Dynamic light scattering in semidilute solutions of nonionic surfactants. Entanglement of elongated micelles
Dynamic light scattering (DLS) has been observed for D/sub 2/O solutions of penta(oxyethylene glycol) n-dodecyl ether (C/sub 12/E/sub 5/) in the range 3-160 kg m/sup -3/ and 5-25 /sup 0/C. The mutual diffusion coefficient (D) obtained by DLS measurements takes a minimum which is shifted to lower concentrations when the temperature is increased. The log D-log c (c is concentration) plot becomes linear in the semidilute region, and the slope of the plot is close to the theoretical value for entangled polymers in good solvent. Self-diffusion coefficients of C/sub 12/E/sub 5/ in the lower concentration range have also been measured by means of pulsed-gradient FT-NMR to examine the effects of the critical concentration fluctuations.
- Research Organization:
- Tokyo Metropolitan Univ., Japan
- OSTI ID:
- 6043376
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:18; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
DATA
DIFFUSION
DISPERSIONS
ETHERS
EXPERIMENTAL DATA
GLYCOLS
HYDROXY COMPOUNDS
INFORMATION
LIGHT SCATTERING
MEDIUM TEMPERATURE
MICELLAR SYSTEMS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
QUANTITY RATIO
SCATTERING
SOLUTIONS
SOLVENTS
SURFACTANTS