Instability of dilute poly(ethylene-oxide) solutions
نویسندگان
چکیده
منابع مشابه
Effect of cyclic chain architecture on properties of dilute solutions of polyethylene from molecular dynamics simulations
We have used molecular dynamics methods to investigate the effects of cyclic chain architecture on the properties of dilute solutions. In order to include solvent effects in estimating these properties, we use a van der Waals scaling factor determined for each solvent by matching to the theta condition. We predict that the theta temperature ~u! of cyclic PE ~c-PE! is ;10% lower than for the lin...
متن کاملHow dilute are dilute solutions in extensional flows?
e investigate the concentration dependence of the characteristic relaxation time of dilute polymer olutions in transient uniaxial elongational flow. A series of monodisperse polystyrene solutions of ve different molecular weights 1.8 106 M 8.3 106 g/mol with concentrations spanning ve orders of magnitude were dissolved in two solvents of differing solvent quality diethylphthalate and oligomeric...
متن کاملEffect of Sweeteners on Viscosity and Particle Size of Dilute Guar Gum Solutions
The effects of some synthetic sweeteners on the rheological and physical properties of guar gum in dilute solutions were investigated.Measurements include the determination of intrinsic viscosity and the particle size, surface weighted mean [D3, 2], volume weighted mean [D4,3] and specificsurface area ofguar gum andsyntheticsweeteners mixtures. T...
متن کاملViscoelasticity of dilute solutions of semiflexible polymers.
We show using Brownian dynamics simulations and theory how the shear relaxation modulus G(t) of dilute solutions of relatively stiff semiflexible polymers differs qualitatively from that of rigid rods. For chains shorter than their persistence length, G(t) exhibits three time regimes: At very early times, when the longitudinal deformation is affine, G(t) approximately t(-3/4). Over a broad inte...
متن کاملTwo-dimensional turbulence of dilute polymer solutions.
We investigate theoretically and numerically the effect of polymer additives on two-dimensional turbulence by means of a viscoelastic model. We provide compelling evidence that, at vanishingly small concentrations, such that the polymers are passively transported, the probability distribution of polymer elongation has a power law tail: Its slope is related to the statistics of finite-time Lyapu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal de Physique Lettres
سال: 1983
ISSN: 0302-072X
DOI: 10.1051/jphyslet:01983004403012100