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 STATE OF DISPERSION OF CALCIUM STEARATE IN MINERAL OILS

1944 ◽  
Vol 22b (6) ◽  
pp. 161-172 ◽  
Author(s):  
Wilfred Gallay ◽  
Ira E. Puddington
Keyword(s):  
Partial Melting ◽  
Surface Activity ◽  
Mineral Oil ◽  
The State ◽  
Calcium Stearate ◽  
Variable Pressure ◽  
Temperature Relation ◽  
Mineral Oils ◽  
Mesomorphic State ◽  
High Degree

Calcium stearate undergoes a partial melting to a mesomorphic state at about 100 °C, as shown by discontinuities in the density–temperature relation and in differential cooling measurements, and by the onset of plasticity. No surface activity is exhibited by the soap in mineral oil, even in the mesomorphic state. Calcium stearate dispersions in a non-polar mineral oil are essentially lyophobic up to 180 °C, whereas the soap is dispersed to a sol in more polar oils at a temperature slightly above the partial melting point.The viscosity of these dispersions, measured over a range of temperatures in a variable-pressure efflux viscosimeter shows unusual characteristics. A maximum viscosity at intermediate temperatures was found, accompanied by a high degree of dilatancy. The presence of water is shown to lower the viscosity and destroy dilatancy by agglomeration of the dispersed soap.

Mesomorphic State

2016 ◽  
Author(s):  
M. Barón ◽  
C. Noël ◽  
V. P. Shibaev ◽  
M. Hess ◽  
A. D. Jenkins ◽  
...  
Keyword(s):  
Mesomorphic State

Mesomorphic State

2016 ◽  
Author(s):  
Richard G. Jones ◽  
Christopher K. Ober ◽  
Philip Hodge ◽  
Pavel Kratochvíl ◽  
Graeme Moad ◽  
...  
Keyword(s):  
Mesomorphic State

scholarly journals AB Block-copolymers poly(oxyethylene)-blockpoly( dicyclohexyl itaconate): temperature dependence of the morphology

e-Polymers ◽  
2004 ◽  
Vol 4 (1) ◽  
Author(s):  
Krasimira Aleksieva ◽  
Ane Ancev ◽  
Slobodanka Koseva ◽  
Maja Cvetkovska ◽  
Emanuel Nedkov
Keyword(s):  
Block Copolymers ◽  
Temperature Dependence ◽  
Optical Microscopy ◽  
Crystalline State ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Chair Conformation ◽  
X Ray ◽  
Mesomorphic State ◽  
Determining Factor

Abstract The paper deals with AB block-copolymers poly(oxyethylene)-blockpoly( dicyclohexyl itaconate) (POE/PDCHI) containing 2000 and 5000 g/mol of the flexible POE. The study aims at revealing the thermal effect on the copolymer morphology in the 20 - 200°C range. Optical microscopy investigations were performed. The results confirm our previous X-ray studies. A liquid crystalline state is observed in the 90 - 180°C range. It is characterized by birefringence and is determined by the chair-chair conformation, a dominating structure of the cyclohexyl rings. A condis-crystal state is observed at cooling in the interval 90°C to room temperature. It is characterised by a variety of cyclohexyl conformations and, therefore, by a lack of birefringence. The PEO component in the copolymer starts crystallising into small local spherulites at about room temperature. The results obtained allow the conclusion that the presence of PDCHI is a determining factor for the mesomorphic state of the copolymers discussed.

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