A note to the determination of the temperature coefficient of unperturbed dimensions of the polymers

1968 ◽  
Vol 33 (12) ◽  
pp. 4397-4400 ◽  
Author(s):  
M. Bohdanecký
Keyword(s):  
Temperature Coefficient ◽  
Unperturbed Dimensions

REACTIONS OF ARYLSULPHONIC ESTERS: VII. THE HEAT CAPACITY OF ACTIVATION FOR THE ETHANOLYSIS OF METHYL p-NITROBENZENESULPHONATE

1957 ◽  
Vol 35 (7) ◽  
pp. 623-629 ◽  
Author(s):  
J. B. Hyne ◽  
R. E. Robertson
Keyword(s):  
Heat Capacity ◽  
Temperature Coefficient ◽  
Nonaqueous Media ◽  
Conductometric Method ◽  
Better Than

A conductometric method is described for the determination of rates of solvolyses in nonaqueous media with an accuracy of better than ± 0.5% in k. The heat of activation derived from the results so obtained is shown to have a temperature coefficient (ΔCp‡) of −21 cal./mole deg.

Thermal lens determination of the temperature coefficient of optical path length in optical materials

2003 ◽  
Vol 74 (1) ◽  
pp. 877-880 ◽  
Author(s):  
A. A. Andrade ◽  
T. Catunda ◽  
I. Bodnar ◽  
J. Mura ◽  
M. L. Baesso
Keyword(s):  
Temperature Coefficient ◽  
Thermal Lens ◽  
Path Length ◽  
Optical Materials ◽  
Optical Path Length ◽  
Optical Path

scholarly journals Boundary lubrication.—The temperature coefficient

1922 ◽  
Vol 101 (713) ◽  
pp. 487-492 ◽  
Keyword(s):  
Experimental Method ◽  
Temperature Coefficient ◽  
Boundary Lubrication ◽  
Static Friction ◽  
Effect Of Temperature ◽  
Dry Air ◽  
Electric Grids ◽  
Continuous Sheet ◽  
A Current

The experimental method employed was that described in earlier papers. A slider having a spherical face is made to slide over a plate in an atmosphere of rigorously clean and dry air. The friction measured is static friction and the object of the experiments the determination of the effect of temperature. This has now been studied over a range of 15°C. to 110°C., and it may be said at once that the relations discovered are of a totally unexpected character. More than one attempt to study the effect of temperature was defeated by the fact that lubricating vapours were given off from the walls of the chamber in which the plate and slider were enclosed. This difficulty was completely removed by using a chamber with double walls, the inner wall being a continuous sheet of nickel. Between the walls were placed the electric grids for heating the chamber. The stream of dry air with which the chamber was flooded was also heated by being passed through a tube of silica, which was maintained at the required temperature by a coil of wire through which a current was passing. The temperature of the stream of air and the temperature of the chamber were recorded electrically.

scholarly journals The effect of temperature on the viscosity of air

1926 ◽  
Vol 110 (753) ◽  
pp. 141-167 ◽  
Keyword(s):  
Kinetic Theory ◽  
Temperature Coefficient ◽  
Effect Of Temperature ◽  
Kinetic Theory Of Gases ◽  
Molecular Models ◽  
Large Measure ◽  
Viscosity Coefficients ◽  
Molecular Forces ◽  
Coefficient Of Viscosity

The Kinetic Theory of Gases leads to a number of relations between the diffusion, conductivity and viscosity coefficients of gases, and the large measure of confirmation of these has been the greatest triumph of that theory. Most of these relations have been shown by S. Chapman and Enskog to be independent of any particular model of the molecule. In the case of the dependence of viscosity upon temperature, however, the theory gives different results for different molecular models, and the determination of the temperature coefficient of viscosity can therefore be of service in the elucidation of molecular forces.

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