The nonlinear rheology of three selected commercial low-density polyethylenes (LDPE) is measured in uniaxial extensional flow. The measurements are performed using three different devices including an extensional viscosity fixture (EVF), a homemade filament stretching rheometer (DTU-FSR) and a commercial filament stretching rheometer (VADER-1000).
Rheology and Fluid Mechanics
Stress Relaxation of Bi-Disperse Polystyrene Melts: Exploring the Interactions between Long and Short Chains in Non-Linear Rheology
We present start-up of uniaxial extension followed by stress relaxation experiments of a bi-disperse 50 % by weight blend of 95k and 545k molecular weight polystyrene. We also show, for comparison, stress relaxation measurements of the polystyrene melts with molecular weight 95k and 545k, which are the components of the bi-disperse melt.
The effect of network topology on material properties in vinyl-ester/styrene thermoset polymers using molecular dynamics simulations and time–temperature superposition
The time–temperature superposition principle (TTSP) is a promising tool for filling the time-scale gap between molecular dynamics simulation and experiments in polymer systems. Here we propose a molecular dynamics approach to generate vinyl-ester (VE)/styrene (ST) thermoset modulus master curves that are comparable to experiments.
Exploring the gel phase of cationic glycylalanylglycine in ethanol/water. II. Spectroscopic, kinetic and thermodynamic studies
Abstract HypothesisRecently, we reported a three-dimensional phase diagram for the gelation of cationic tripeptide glycylalanylglycine (GAG) in water–ethanol
Exploring the gel phase of cationic glycylalanylglycine in ethanol/water. I. Rheology and microscopy studies
Abstract HypothesisThe cationic tripeptide glycylalanylglycine (GAG) self-assembles into long, thick crystalline fibrils in an ethanol/water solution. At sufficiently
Formulation of a model resin system for benchmarking processing-property relationships in high-performance photo 3D printing applications
Abstract A well-defined resin system is needed to serve as a benchmark for 3D printing of high-performance composites.
Abstract High performance ultra high molecular weight polyethylene (UHMWPE) fibers are primarily composed of extended chain (shish) and
Correlating Processing Conditions to Short- and Long-Range Order in Coating and Drying Lithium-Ion Batteries
Abstract Processing conditions of battery slurries into electrodes are known to affect final battery performance. However, there is
Characterizing Long-chain Branching in Commercial HDPE Samples via Linear Viscoelasticity and Extensional Rheology
Abstract It is well established that polymer chain architecture and the distribution of molecular weight play a key