The Mesomorphic State of Flexible-Chain Polymers

1993 ◽  
pp. 125-162
Author(s):  
Yu. K. Godovskii ◽  
V. S. Papkov
Keyword(s):  
Flexible Chain ◽  
Mesomorphic State

scholarly journals Hyaluronan orders water molecules in its nanoscale extended hydration shells

2021 ◽  
Vol 7 (10) ◽  
pp. eabf2558
Author(s):  
J. Dedic ◽  
H. I. Okur ◽  
S. Roke
Keyword(s):  
Second Harmonic ◽  
Hydration Shell ◽  
Water Molecules ◽  
Temperature Dependent ◽  
Flexible Chain ◽  
Optical Modeling ◽  
Hydration Shells ◽  
Second Harmonic Scattering ◽  
Nuclear Quantum Effects ◽  
Extracellular Environment

Hyaluronan (HA) is an anionic, highly hydrated bio-polyelectrolyte found in the extracellular environment, like the synovial fluid between joints. We explore the extended hydration shell structure of HA in water using femtosecond elastic second-harmonic scattering (fs-ESHS). HA enhances orientational water-water correlations. Angle-resolved fs-ESHS measurements and nonlinear optical modeling show that HA behaves like a flexible chain surrounded by extended shells of orientationally correlated water. We describe several ways to determine the concentration-dependent size and shape of a polyelectrolyte in water, using the amount of water oriented by the polyelectrolyte charges as a contrast agent. The spatial extent of the hydration shell is determined via temperature-dependent measurements and can reach up to 475 nm, corresponding to a length of 1600 water molecules. A strong isotope effect, stemming from nuclear quantum effects, is observed when light water (H2O) is replaced by heavy water (D2O), amounting to a factor of 4.3 in the scattered SH intensity.

Magnetic properties of metal oxide clusters linked by flexible chain siloxane fragments

1999 ◽  
Vol 48 (9) ◽  
pp. 1670-1672
Author(s):  
M. M. Levitsky ◽  
A. R. Arutyunyan ◽  
B. G. Zavin ◽  
V. V. Erokhin ◽  
A. L. Buchachenko
Keyword(s):  
Magnetic Properties ◽  
Metal Oxide ◽  
Flexible Chain ◽  
Metal Oxide Clusters

NIR-region two-photon fluorescent probes for Fe3+/Cu2+ ions based on pyrimidine derivatives with different flexible chain

2016 ◽  
Vol 222 ◽  
pp. 574-578 ◽  
Author(s):  
Qiong Zhang ◽  
Xiaohe Tian ◽  
Hui Wang ◽  
Zhangjun Hu ◽  
Jieying Wu ◽  
...  
Keyword(s):  
Fluorescent Probes ◽  
Pyrimidine Derivatives ◽  
Flexible Chain ◽  
Two Photon

Dynamical aspects of the formation of the mesomorphic state structure

1980 ◽  
Vol 48 (2-3) ◽  
pp. 281-291
Author(s):  
V. K. Pershin ◽  
Vl. K. Pershin ◽  
L. A. Fishbein
Keyword(s):  
State Structure ◽  
Mesomorphic State

scholarly journals Poly(4-vinyl pyridine)/Zinc Dodecyl Benzene Sulfonate Mesomorphic State Due to Coordination Complexation

1995 ◽  
Vol 28 (23) ◽  
pp. 7779-7784 ◽  
Author(s):  
Janne Ruokolainen ◽  
Juha Tanner ◽  
Gerrit ten Brinke ◽  
Olli Ikkala ◽  
Mika Torkkeli ◽  
...  
Keyword(s):  
Benzene Sulfonate ◽  
Vinyl Pyridine ◽  
Dodecyl Benzene Sulfonate ◽  
Mesomorphic State

The static electrifications of linear flexible-chain polymers extruded through ducts above the glass transition temperature

1987 ◽  
Vol 409 (1837) ◽  
pp. 249-270 ◽  
Keyword(s):  
Molecular Mass ◽  
Anionic Polymerization ◽  
Chemical Nature ◽  
Molecular Mass Distribution ◽  
Relaxation Transition ◽  
Sliding Velocity ◽  
Flexible Chain ◽  
Mass Distributions ◽  
Static Electrification ◽  
Molecular Masses

A study has been made into electrification of linear flexible-chain polymers extruded through metal and dielectric ducts. Most of the work concerns 1,4-polybutadienes prepared by anionic polymerization, with different molecular masses and molecular mass distributions. A pre-requisite for intense static electrification is the relaxation transition of the polymer from fluid into forced high-elastic state in which the polymer slides over the duct wall surface. The relation between electrification of polymers and their molecular mass, molecular-mass distribution, temperature, sliding velocity, and the duct length has been established. Electrification of polybutadiene in dielectric ducts and the effect of the chemical nature of polymers on their static electrification were also examined.

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