Search Results - "Graessley, W. W"

Packing Length Influence in Linear Polymer Melts on the Entanglement, Critical, and Reptation Molecular Weights by Fetters, Lewis J, Lohse, David J, Milner, Scott T, Graessley, William W

“…We have shown in previous studies that the entanglement molecular weight for a polymer melt, M e, is related by a power law to p, the packing length of the…”
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Polymer dimensions in good solvents: crossover from semidilute to concentrated solutions by Cheng, G, Graessley, W W, Melnichenko, Y B

“…Using small-angle neutron scattering, we studied the variation of the polymer radius of gyration (R_{g}) as a function of polymer concentration (varphi) for…”
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Chain dimensions and entanglement spacings in dense macromolecular systems by Fetters, Lewis J., Lohse, David J., Graessley, William W.

“…In this article, we reexamine and extend a relationship proposed earlier between entanglement density and chain dimensions in polymer melts. The power‐law…”
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A Study of the Separation Principle in Size Exclusion Chromatography by Sun, Thomas, Chance, Ronald R, Graessley, William W, Lohse, David J

“…Size exclusion chromatography (SEC) separates polymer molecules according to their size in dilute solution, but what size to use has been a matter of debate…”
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Small Angle Neutron Scattering Investigations of Melt Miscibility and Phase Segregation in Blends of Linear and Branched Polyethylenes as a Function of the Branch Content by Alamo, R. G, Graessley, W. W, Krishnamoorti, R, Lohse, D. J, Londono, J. D, Mandelkern, L, Stehling, F. C, Wignall, G. D

“…We have performed a series of small angle neutron scattering (SANS) experiments on blends of linear and branched polyethylenes to investigate the level of…”
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Effect of Short Chain Branching on the Coil Dimensions of Polyolefins in Dilute Solution by Sun, Thomas, Brant, Patrick, Chance, Ronald R, Graessley, William W

“…This paper deals with the short branch effect in α-olefin copolymers on radius of gyration R g and intrinsic viscosity [η] in trichlorobenzene at 135 °C. A…”
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Thermodynamic interactions in model polyolefin blends obtained by small-angle neutron scattering by Balsara, N. P, Fetters, L. J, Hadjichristidis, N, Lohse, D. J, Han, C. C, Graessley, W. W, Krishnamoorti, R

“…The dependence of Flory--Huggins interaction parameter sub on temperature, composition, and chain length was investigated for binary blends of amorphous model…”
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Viscosity and self-diffusion coefficient of hydrogenated polybutadiene by Pearson, Dale S, Fetters, Lewis J, Graessley, William W, Ver Strate, Gary, von Meerwall, Ernst

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Steady-Shear Rheology of Block Copolymer Melts and Concentrated Solutions:  Disordering Stress in Body-Centered-Cubic Systems by Sebastian, John M, Lai, Chiajen, Graessley, William W, Register, Richard A

“…We use steady-shear rheology to study the shear-disordering phenomenon in block copolymers in the body-centered-cubic (bcc) mesophase. Polystyrene−polyisoprene…”
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Regular and Irregular Mixing in Blends of Saturated Hydrocarbon Polymers by Graessley, William W, Krishnamoorti, Ramanan, Reichart, Glenn C, Balsara, Nitash P, Fetters, Lewis J, Lohse, David J

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Effect of Pressure on Polymer Blend Miscibility:  A Temperature−Pressure Superposition by Rabeony, M, Lohse, D. J, Garner, R. T, Han, S. J, Graessley, W. W, Migler, K. B

“…In this paper, we report on how interaction strength varies with pressure and temperature for several polyolefin mixtures. We find that the interaction…”
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Ordering Dynamics of Compositionally Asymmetric Styrene−Isoprene Block Copolymers by Adams, J. LaMonte, Quiram, Daniel J, Graessley, William W, Register, Richard A, Marchand, Gary R

“…We investigate the development of mesophase order in compositionally asymmetric (13 wt % styrene) polystyrene−polyisoprene (SI) diblock and SIS triblock…”
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Scattering by Modestly Concentrated Polymer Solutions by Graessley, William W

“…The angular dependence of static scattering intensity for polymer solutions beyond coil overlap is commonly associated with excluded-volume screening behavior…”
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Structural Origin of Thermodynamic Interactions in Blends of Saturated Hydrocarbon Polymers by Krishnamoorti, Ramanan, Graessley, William W, Balsara, Nitash P, Lohse, David J

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The melt viscosity-molecular weight relationship for linear polymers by Colby, Ralph H, Fetters, Lewis J, Graessley, William W

“…The relationship between melt viscosity eta sub 0 and molecular weight M for entangled linear polymers is accurately described by a power law, eta sub 0…”
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Excluded Volume Effects in Polymer Solutions. 1. Dilute Solution Properties of Linear Chains in Good and ϑ Solvents by Hayward, Ryan C, Graessley, William W

“…Data from the literature on four dilute solution propertiesradius of gyration, second virial coefficient, intrinsic viscosity, and diffusion coefficientwere…”
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Excluded-Volume Effects in Polymer Solutions. 2. Comparison of Experimental Results with Numerical Simulation Data by Graessley, William W, Hayward, Ryan C, Grest, Gary S

“…The effect of excluded volume on the coil size of dilute linear polymers was investigated by off-lattice Monte Carlo simulations. The radius of gyration R g…”
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Rheology and the Microphase Separation Transition in Styrene-Isoprene Block Copolymers by Adams, J. LaMonte, Graessley, William W, Register, Richard A

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Effects of concentration and thermodynamic interaction on the viscoelastic properties of polymer solutions by Colby, Ralph H, Fetters, Lewis J, Funk, Walter G, Graessley, William W

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Melt-state polymer chain dimensions as a function of temperature by Krishnamoorti, Ramanan, Graessley, William W., Zirkel, Achim, Richter, Dieter, Hadjichristidis, Nikos, Fetters, Lewis J., Lohse, David J.

“…The unperturbed chain dimensions (〈R2〉o/M) of cis/trans‐1,4‐polyisoprene, a near‐atactic poly(methyl methacrylate), and atactic polyolefins were measured as a…”
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