Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Robert Yaris"'
Autor:
Christopher A. Klug, In Sook Han Lee, Maurice M. Kreevoy, Jacob Schaefer, Robert Yaris, Patricia Lani Lee
Publikováno v:
The Journal of Physical Chemistry B. 101:8086-8091
Autor:
Robert Yaris, Duane R. Whitney
Publikováno v:
Macromolecules. 30:1741-1751
In order to obtain the mechanism for the infrequent phenyl ring π-flips in glassy polycarbonate, a generalized Langevin dynamics simulation was performed on a reduced model consisting of a flipping ring and its keeper ring. The frequency of π-flips
Autor:
Piotr Romiszowski, Robert Yaris
Publikováno v:
The Journal of Chemical Physics. 95:6738-6744
Our method [P. Romiszowski and R. Yaris, J. Chem. Phys. 94, 6751, (1991)] of simulating infrequent motions by using an equation of motion with the uninteresting degrees of freedom suppressed—the generalized Langevin equation—has been extended to
Autor:
Piotr Romiszowski, Robert Yaris
Publikováno v:
The Journal of Chemical Physics. 94:6751-6761
In order to be able to simulate slow or infrequent motions which require extremely long (or sometimes impossibly long) simulations, a method of simulation using an equation of motion with the uninteresting degrees of freedom suppressed—the generali
Autor:
Robert Yaris
Publikováno v:
International Journal of Quantum Chemistry. 22:665-665
Autor:
Piotr Romiszowski, Robert Yaris
Publikováno v:
The Journal of Chemical Physics. 95:7013-7014
It is shown that both the full simulation and the generalized Langevin dynamics simulation π flips in a two‐dimensional array of interacting benzene rings [P. Romiszowski and R. Yaris, J. Chem. Phys. XX, xxxx (1991)] satisfy Poisson statistics.
Autor:
Robert Yaris, John T. Bendler
Publikováno v:
Macromolecules. 11:650-655
Publikováno v:
Macromolecules. 18:368-373
Calculations of the conformational preferences of isolated single chains of poly(2,6-di- methylphenylene oxide) (PPO) and bisphenol-A polycarbonate (PC) predict that the rings of both chains are nearly free rotors at room temperature. However, experi
Autor:
Robert Yaris, Jeffrey Skolnick
Publikováno v:
Macromolecules. 15:1046-1051
The damped diffusion model presented in the previous paper is applied to the 'H NMR relaxation rates and dielectric loss data of poly(viny1 acetate) in toluene. The results are compared to those obtained from the cutoff diffusion model of Bendler and
Publikováno v:
The Journal of Chemical Physics. 86:7164-7173
Dynamic Monte Carlo simulations of long chains confined to a cubic lattice system at a polymer volume fraction of φ=0.5 were employed to investigate the dynamics of polymer melts. It is shown that in the range of chain lengths n, from n=64 to n=800