Zobrazeno 1 - 10
of 474
pro vyhledávání: '"S. C. Greer"'
Publikováno v:
The Journal of Chemical Physics. 111:9406-9417
We have measured the molecular weight distribution (MWD) in a case of equilibrium polymerization. We have studied the time development of the MWD of “living” bifunctional poly(α-methylstyrene) in tetrahydrofuran after a quench to 21 K below the
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 244:522-535
We present new measurements of the kinetics of polymerization near the polymerization line of poly(α-methylstyrene) in the solvent tetrahydrofuran, initiated by sodium naphthalide or cesium naphthalide. We develop a computer model of the kinetics of
Publikováno v:
The Journal of Chemical Physics. 107:4705-4710
We present here measurements of the heat capacity at constant pressure near the ceiling temperature for the anionic polymerization of an organic monomer. The measurements support the suggestion [S. J. Kennedy and J. C. Wheeler, J. Chem. Phys. 78, 953
Publikováno v:
The Journal of Chemical Physics. 102:2951-2959
We measure the extent of polymerization, Φ, as a function of temperature, T, for living poly(α‐methylstyrene) in the solvent tetrahydrofuran, using sodium naphthalide and cesium naphthalide as the initiating species. We compare our measurements o
Publikováno v:
Macromolecules. 27:3902-3911
SANS measurements are presented for the system living poly(α-methylstyrene) in deuterated THF, using sodium naphthalide as the initiator. We study three samples, differing in the ratio, r, of the number of moles of initiator to the number of moles o
Publikováno v:
The Journal of Chemical Physics. 98:9873-9880
We present the experimental determination of the liquid–liquid coexistence curve of living poly‐α‐methylstyrene (initiated by n‐butyllithium) in methylcyclohexane. We measured the coexistence curve by measuring the phase separation temperatu
Autor:
S. C. Greer, K. M. Zheng
Publikováno v:
Macromolecules. 25:6128-6136
The mass density, ρ, of solutions of living poly(α-methylstyrene) in THF was measured as a function of temperature, T, near the polymerization temperatures, T p and the results are compared to two models of equilibrium polymerization as a second-or
Autor:
S. C. Greer, K. M. Zheng
Publikováno v:
The Journal of Chemical Physics. 96:2175-2182
We have measured the density of liquid sulfur as a function of temperature near the polymerizationtemperature. We measure between 424 and 445 K, with a precision in density of 2×10−5 and an accuracy of 5×10−4. We see upward shifts of the densit
Publikováno v:
Journal of Chemical & Engineering Data. 44:1419-1421
We report new measurements of the liquid−liquid phase separation curves of poly(α-methylstyrene) + methylcyclohexane, for three well-characterized samples of the polymer with number average molecular weights of (A) 19 700, (B) 32 300, and (C) 72 0
Publikováno v:
Macromolecules. 23:510-515
La viscosite augmente d'un facteur 10 en baissant la temperature de 366,6 K jusqu'au voisinage du point critique (275, 286 K). La variation de la densite est lineaire sur ce domaine. L'analyse des donnees est compliquee par les effets de cisaillement