Zobrazeno 1 - 10
of 13
pro vyhledávání: '"E. B. Sirota"'
Publikováno v:
Macromolecules. 33:6174-6184
Homogeneous nucleation of crystallizing n-alkanes (CH3−(CH2)n-2−CH3, 17 ≤ n ≤ 60) and some low-MW polyethylene (PE) fractions were studied using calorimetry and compared to reanalyzed PE data of Ross and Frolen. The undercooling and derived s
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 164:55-61
Surface freezing, i.e. the formation of a solid bilayer at the surface of a pure alcohol melt above the freezing temperature, was recently discovered. We demonstrate here that the structure of the bilayer can be influenced by specific bulk additives.
Autor:
E. B. Sirota
Publikováno v:
The Journal of Chemical Physics. 112:492-500
The supercooling exhibited by bulk solutions of the n-alkane tricosane (C23) in dodecane (C12) is measured as a function of concentration using adiabatic scanning calorimetry. For small dilutions where crystallization occurs into the rotator phase, n
Publikováno v:
Synchrotron Radiation News. 12:34-40
Publikováno v:
Physical Review Letters. 82:588-591
Surface crystallization is studied in mixed alcohol-diol melts by x-ray diffraction and surface tensiometry. A reversible transition, having no bulk counterpart, from a bilayer to a monolayer surface phase, tunable by either diol concentration {phi}
Publikováno v:
Physical Review E. 58:6086-6100
Surface freezing is studied in dry and hydrated normal-alcohol melts by x-ray scattering and surface tensiometry. A single crystalline bilayer forms at the surface, for even carbon numbers only, at temperatures up to 1{degree}C (dry) or 2{degree}C (w
Autor:
E. B. Sirota
Publikováno v:
Petroleum Science and Technology. 16:415-431
We report x-ray scattering measurements on asphaltenes and bitumen solutions, with attention to the concentrated regimes. We characterize the data in terms of a correlation length which is indicative of proximity to phase separation in a mixture, rat
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 128:63-74
Surface freezing is studied in molten binary mixtures of alkanes and alcohols of different lengths using X-ray surface scattering and surface tension measurements. A crystalline monolayer (for alkanes) or bilayer (for alcohols) is formed at the surfa
Autor:
E. B. Sirota, X. Z. Wu
Publikováno v:
The Journal of Chemical Physics. 105:7763-7773
We report an x‐ray scattering study of the rotator phases in both dry and hydrated 1‐alcohols CH3–(CH2)n−1–OH(12≤n≤26). Hydration was accomplished by using both fixed composition and controlled relative humidity. A hexagonal phase and t
Publikováno v:
Journal of Physics D: Applied Physics. 26:B133-B136
The authors present results of an X-ray scattering study on the rotator phases of normal alkanes: CH3-(CH2)n-2-CH3 (20