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A comparison of implicit- and explicit-solvent simulations of self-assembly in block copolymer and solute systems.
Each of the two models was parameterized to match key properties of the diblock copolymer (specifically, critical micelle concentration, diffusion coefficient, polystyrene melt density , and polyethylene glycol radius of gyration) and the hydrophobic solute (aqueous solubility, diffusion coefficient, and solid density).
Viscosities of molten polymer blends
This led to three estimates for the melt density of polystyrene at 21OOC: 0.9296 g/cm3, 0.9282 and 0.9241, all of which were slightly lower than the average of the 12measured values on PS itself, 0.9313 g/cm3.
The modified imbedded disc retraction method for measurement of interfacial tension in polymer melts
In order to determine the melt density of polystyrene for the equilibrium diameter calculation, density was measured for this material at 190.0 °C and 227.7 °C using a melt indexer (Kayeness Inc. Model D-0035).
Heat transfer behavior of melting polymers in laminar flow field
Moreover, the pressure-volume-temperature (PVT) properties of melting polymers are such that the density of melting polystyrene and polypropylene decreases 5Ϫ7% and 14Ϫ19.7%, respectively, and this density reduction af- fects the heat transfer behavior (10).
Analysis of the performance of cooling extruders in thermoplastic foam extrusion
For the analysis, a power‐law model was used as the constitutive rheologlcal equation, describing the viscosities of a mixture of a fluorocarbon blowing agent and a low‐ density polyethylene melt (or polystyrene melt).
Direct comparison of equibiaxial elongational viscosity measurements from lubricated squeezing flow and the MultiAxiales Dehnrheometer
Comparisons of transient equibiaxial elongational viscosity are car- ried out at strain rates well into the nonlinear regime on low- density polyethylene and polystyrene melts .
Rheological behavior of polymer melts with natural fibers
The theoretical predictions are in good accordance with viscosity measurements for low‐ density polyethylene and polystyrene melts filled with short cotton, flax, and hemp fibers.
Elongational behavior of short glass fiber reinforced polypropylene melts
The only study of the elongational flow behavior of fiber reinforced thermoplastic melts has been reported by White, et al (9, 10) on glass fiber reinforced high density polyethylene and polysty- rene melts .
Flow visualization for injection molding of polyethylene and polystyrene melts
Abstract Flow patterns have been observed during the injection molding of rheologically characterized low‐ density polyethylene and polystyrene melts under various molding conditions.
Steady‐State and dynamic properties of concentrated fiber‐filled thermoplastics
Previous work illustrated similar results for concentrated sus- pensions of silicon oils by Maschmeyer and Hill (7). concentrated fiber-filled high- density polyethylene and polystyrene melts by Chan et aL (8).and for rigid rod (liquid crystalline) suspensions by Becraft and Metzner …

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