scholarly journals XXXI.—The dielectric constants of some organic solvents at their melting or boiling points

1915 ◽  
Vol 107 (0) ◽  
pp. 276-282 ◽  
Author(s):  
John Douglas Cauwood ◽  
William Ernest Stephen Turner
Keyword(s):  
Organic Solvents ◽  
Dielectric Constants ◽  
Boiling Points

Organo-Soluble, Segmented Rigid-Rod Polyimides: Synthesis and Properties

1991 ◽  
Vol 227 ◽  
Author(s):  
F. W. Harris ◽  
S. L. C. Hsu ◽  
C. J. Lee ◽  
B. S. Lee ◽  
F. Arnold ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Expansion ◽  
Glass Transition ◽  
Oxidative Stability ◽  
Organic Solvents ◽  
Dielectric Constants ◽  
Glass Transition Temperatures ◽  
Thermal Expansion Coefficients ◽  
Rigid Rod ◽  
Expansion Coefficients

ABSTRACTSeveral segmented, rigid-rod polyimides have been prepared that are soluble in organic solvents in their fully imidized form. The polymers were prepared from commercial dianhydrides and 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl (TFMB). Their intrinsic viscosities ranged from 1.0 to 4.9 dL/g. Tough, colorless films could be cast from m-cresol solutions at 100°C. The polymers had glass transition temperatures (Tgs) above 275°C and displayed outstanding thermal and thermo-oxidative stability. Fibers were prepared from the 3,3′,4,4′-tetracarboxybiphenyl dianhydride (BPDA) based polymers that had moduli of 130 GPa and tensile strengths of 3.2 GPa. The thermal expansion coefficients and dielectric constants of thin films (20–25 μm) of the polymers were as low as −2.40×10−6 and 2.5, respectively.

Dissociation of C6F5SO3Li in two organic solvents with different dielectric constants: a Raman spectroscopic study

2007 ◽  
Vol 38 (12) ◽  
pp. 1570-1576 ◽  
Author(s):  
G. Hirankumar ◽  
C. Iojoiu ◽  
F. Alloin ◽  
J. Y. Sanchez ◽  
T. Pagnier
Keyword(s):  
Spectroscopic Study ◽  
Organic Solvents ◽  
Dielectric Constants ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

Pervaporation and Vapor Permeation Characteristics of a Porous SiO2-ZrO2 Membrane for Separation of Organic Solvents/Water Mixtures

2002 ◽  
Vol 752 ◽  
Author(s):  
Masashi Asaeda ◽  
Yasuhumi Tasaka
Keyword(s):  
Phase Separation ◽  
Organic Solvents ◽  
Sol Gel ◽  
Water Flux ◽  
High Water ◽  
High Water Content ◽  
Liquid Equilibrium ◽  
Vapor Permeation ◽  
Boiling Points ◽  
Porous Sio2

ABSTRACTThe sol-gel techniques were applied to fabricate some improved porous SiO2-ZrO2(50%) membranes for separation of organic solvents/water mixtures by pervaporation and vapor permeation methods at the normal boiling points of mixtures such as iso-propanol(IPA)/water and 1-propanol /water mixtures. The porous SiO2-ZrO2 membranes were found quite stable even at a high water content in the feed mixtures. They showed quite large pervaporation fluxes more than 450moles/(m2h) at 73mol% of IPA in the feed, for example, while the water flux for vapor phase separation at the same conditions was around 250mol/(m2h). The separation characteristics of organic chemicals/water mixtures by pervaporation and the vapor permeation methods are largely different in many points. Especially in this work separation by vapor permeation has been studied to compare with that of pervaporation taking into account the vapor-liquid equilibrium characteristics of the mixtures.

Solvent dependent intramolecular excimer emission of di(1-pyrenyl)silane and di(1-pyrenyl)methane derivatives

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 5846-5849 ◽  
Author(s):  
Shin-ichi Kondo ◽  
Yuka Taguchi ◽  
Yi Bie
Keyword(s):  
Organic Solvents ◽  
Dielectric Constants ◽  
Excimer Emission ◽  
Polar Organic Solvents ◽  
Intramolecular Excimer

Di(1-pyrenyl)silane and methane derivatives showed unprecedented intramolecular excimer emission in polar organic solvents such as DMSO and the ratio of excimer/monomer emissions strongly depends on the dielectric constants of the solvents.

Solvent Coagulation of Serum Proteins

1964 ◽  
Vol 10 (9) ◽  
pp. 789-792 ◽  
Author(s):  
Morris London ◽  
Jesse H Marymont ◽  
Jeanne Fuld
Keyword(s):  
Ethylene Glycol ◽  
Organic Solvents ◽  
Serum Proteins ◽  
Monomethyl Ether ◽  
Dimethyl Formamide ◽  
Ethylene Glycol Monomethyl Ether ◽  
Glycol Monomethyl Ether ◽  
Boiling Points

Abstract The usefulness of 14 common organic solvents in lowering the temperature necessary for the heat coagulation of serum proteins is evaluated. Six of the compounds, when added to serum in final concentrations varying from 14.3 to 28.6% (v/v), result in the formation of a firm clot at 60°. Ethylene glycol monomethyl ether is effective at 50° at 22.8% (v/v). Lower concentrations are effective at higher temperatures. The boiling points of the six range from 65° (methanol) to 153° (N,N-dimethyl formamide).

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