Distribution of relaxation times from dynamic light scattering on semidilute solutions: polystyrene in ethyl acetate as a function of temperature from good to .THETA. conditions

1988 ◽  
Vol 21 (6) ◽  
pp. 1791-1798 ◽  
Author(s):  
Wyn Brown ◽  
Petr Stepanek
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Ethyl Acetate ◽  
Relaxation Times ◽  
Semidilute Solutions

Dynamic light scattering of polymer solutions. 4. Semidilute solutions of polystyrenes and their binary blends in benzene

1984 ◽  
Vol 17 (12) ◽  
pp. 2629-2633 ◽  
Author(s):  
Norio Nemoto ◽  
Yutaka Makita ◽  
Yoshisuke Tsunashima ◽  
Michio Kurata
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Polymer Solutions ◽  
Binary Blends ◽  
Semidilute Solutions

Heterogeneous Microcomposite Materials Based on Porous Matrices and Liquid Crystals

1996 ◽  
Vol 431 ◽  
Author(s):  
F. M. Aliev ◽  
G. P. Sinha
Keyword(s):  
Liquid Crystals ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Physical Properties ◽  
Wide Spectrum ◽  
Relaxation Times ◽  
Average Pore ◽  
Relaxational Process ◽  
Porous Matrices ◽  
Interconnected Pores

AbstractHeterogeneous microcomposite materials based on porous matrices with randomly oriented, interconnected pores (porous glasses with average pore sizes of 100 Å and 1000 Å) and parallel cylindrical pores (Anopore membranes with pore diameters of 200 Å and 2000 Å) impregnated with liquid crystals (LC) were investigated by dynamic light scattering and dielectric spectroscopy. The physical properties of confined LC are very different from that of the bulk. One of the new properties among others observed for LC confined in porous matrices is the slow relaxational process which does not exist in the bulk LC and a wide spectrum of relaxation times (10−8 – 10)s which were established in both dynamic light scattering and dielectric experiments. We found that for LC dispersed in porous matrices with randomly distributed interconnected pores, the contribution to physical properties and observed behavior from interfacial layers dominates and almost completely determines low frequency relaxational process.

Dynamic light scattering study of semidilute solutions of a stiff‐chain polymer

1984 ◽  
Vol 80 (10) ◽  
pp. 5312-5325 ◽  
Author(s):  
Paul S. Russo ◽  
Kenneth H. Langley ◽  
Frank E. Karasz
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Chain Polymer ◽  
Semidilute Solutions ◽  
Scattering Study ◽  
Stiff Chain

Dynamic Light Scattering from Mixtures of Two Polystyrene Samples in Dilute and Semidilute Solutions

1996 ◽  
Vol 29 (18) ◽  
pp. 5948-5954 ◽  
Author(s):  
Julia Corrotto ◽  
Francisco Ortega ◽  
María Vázquez ◽  
Juan J. Freire
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Semidilute Solutions
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