An interpretation on the broadness of low-temperature dielectric absorption curve in high polymers

1967 ◽  
Vol 221 (1) ◽  
pp. 63-63 ◽  
Author(s):  
Kaoru Yamafuji ◽  
Yoichi Ishida
Keyword(s):  
Low Temperature ◽  
Absorption Curve ◽  
Dielectric Absorption ◽  
High Polymers

scholarly journals The behaviour of visual purple at low temperature

1941 ◽  
Vol 179 (977) ◽  
pp. 151-159 ◽  
Keyword(s):  
Aqueous Solution ◽  
Low Temperature ◽  
Low Temperatures ◽  
Room Temperature ◽  
Absorption Curve ◽  
Quantum Yields

Visual purple is soluble and stable in a mixture of glycerol and water (3:1). At room temperature the spectrum of such a solution is identical with that of the aqueous solution. At — 73° C the peak of the absorption curve is higher and narrower than at room temperature, and it is shifted towards longer waves. The product of photodecomposition at — 73° C has a spectrum in ­ dependent of pH and is at low temperatures thermostable and photostable, but at room temperature it decomposes therm ally to indicator yellow. The primary product appears to be identical with transient orange. The quantum yields of the photoreaction at low and at room temperature are of the same order.

The conformation and reorientation of enclathrated 1,2-dichloroethane

1979 ◽  
Vol 57 (6) ◽  
pp. 635-637 ◽  
Author(s):  
S. K. Garg ◽  
D. W. Davidson ◽  
S. R. Gough ◽  
J. A. Ripmeester
Keyword(s):  
Activation Energy ◽  
Low Temperature ◽  
Dihedral Angle ◽  
Line Shape ◽  
Guest Molecule ◽  
Spectral Simulation ◽  
Rigid Lattice ◽  
Average Activation Energy ◽  
Dielectric Absorption

The rigid-lattice nmr line shape of the four-proton system in 1,2-dihaloethanes has been obtained by spectral simulation as a function of dihedral angle [Formula: see text] and used to show that 1,2-dichloroethane is encaged in the structure II hydrate in a gauche configuration with [Formula: see text] Very broad low-temperature dielectric absorption is associated with an average activation energy of 0.87 kcal/mol for guest-molecule reorientation.

Dielectric evidence for the formation of a clathrate hydrate by sulfuryl chloride

1983 ◽  
Vol 61 (9) ◽  
pp. 2053-2054 ◽  
Author(s):  
S. R. Gough ◽  
J. A. Ripmeester ◽  
D. W. Davidson
Keyword(s):  
Activation Energy ◽  
Low Temperature ◽  
Clathrate Hydrate ◽  
Sulfuryl Chloride ◽  
Dielectric Absorption ◽  
Structure Ii Clathrate Hydrate

A hydrate formed by SO2Cl2 at −20 °C is shown by its low temperature dielectric absorption to be a structure II clathrate hydrate. The activation energy for reorientation of encaged SO2Cl2 molecules is 1.1 kcal mol−1 between 19 and 41 K.

Low-temperature dielectric absorption of polypropylene containing light alkanes

1986 ◽  
Vol 106 (2) ◽  
pp. 293-301 ◽  
Author(s):  
John le G. Gilchrist ◽  
Jagdish K. Vij
Keyword(s):  
Low Temperature ◽  
Light Alkanes ◽  
Dielectric Absorption

scholarly journals The behaviour of visual purple at low temperature

1941 ◽  
Vol 130 (859) ◽  
pp. 217-225 ◽  
Keyword(s):  
Aqueous Solution ◽  
Low Temperature ◽  
Low Temperatures ◽  
Room Temperature ◽  
Absorption Curve ◽  
Quantum Yields

Visual purple is soluble and stable in a mixture of glycerol and water (3:1). At room temperature the spectrum of such a solution is identical with that of the aqueous solution. At — 73°C the peak of the absorption curve is higher and narrower than at room temperature, and it is shifted towards longer waves. The product of photodecom position at — 73°C has a spectrum in dependent of pH and is at low temperatures thermostable and photostable, but at room temperature it decomposes therm ally to indicator yellow. The primary product appears to be identical with transient orange. The quantum yields of the photoreaction at low and at room temperature are of the same order.

scholarly journals Shape of Dielectric Absorption Curves in Solid Linear High Polymers

1962 ◽  
Vol 11 (104) ◽  
pp. 330-336
Author(s):  
Motowo TAKAYANAGI ◽  
Yoichi ISHIDA ◽  
Kaoru YAMAFUJI ◽  
Hideo ITO ◽  
Masato MATSUO
Keyword(s):  
Dielectric Absorption ◽  
High Polymers
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