Learning Reduced Order Dynamics via Geometric Representations
Imran Nasim, Melanie Weber
SCML 2024
Rheological measurements are reported for a fully nematic thermotropic liquid crystalline copolyester composed of 80% p-hydroxybenzoic acid/20% poly (ethylene terephthalate). The polymer displays shear thinning behavior with a constant power-law index over eight decades of shear rate; no shear-independent plateau (region II) is observed. Dynamic time sweeps indicate a high sensitivity of the rheological parameters to thermal history, apparently resulting from crystalline annealing. These annealing effects could be erased by appropriate thermal cycling. Torsional measurements (cone-and-plate) were limited at high shear rates by the occurrence of edge fracture. This instability was typically accompanied by an unusual sample texture composed of concentric rings, which was particularly distinct when offgassing had occurred in the polymer melt. © 1990, The Society of Rheology. All rights reserved.
Imran Nasim, Melanie Weber
SCML 2024
A.B. McLean, R.H. Williams
Journal of Physics C: Solid State Physics
David B. Mitzi
Journal of Materials Chemistry
R.M. Macfarlane, R.L. Cone
Physical Review B - CMMP