Other

Georgy V Vinogradov

Jury G Yanovsky

Nikolai S Nametkin

Lev Petrovich Ulyanov

Ernest I Frenkin

Mikhail M Chernysh

Alexandr A Konstantinov

Sergei Ivanovich Sergeenkov

Natalya Nikolaevna Kastorskaya

Jury Y Podolsky

Olga V Vasilieva

Jury F Deinega

Oleg Nikolaevich Borisenkov

Nina T Pavlovskaya

A method for determination of rheological characteristics of polymer and disperse systems, comprising the steps of placing a system to be investigated into a gap between two coaxial cylinders, the first cylinder being rigidly secured on the case of the device, while the second cylinder is rigidly connected to an output shaft of a servo drive, subjecting the system to mechanical deformation by tangentially displacing one of the cylinders in relation to the other conditioned by the restricted shear flow of the system, and exposing the system to an electrical field produced in the gap by connecting a voltage source to the external cylinder provided with butt ends transparent for radiation. The specified deformation and double refraction of the system are measured to determine thereby the rheological characteristics of the system being investigated.

Method and device for determination of rheological characteristics of

A self-lubricating heat-resistant material which, in accordance with the invention, comprises from 20 to 90 percent by weight of a polymer binder, viz. poly(butadiene) with a degree of cross-linking from 30 to 95 percent, and from 10 to 80 percent by weight of an antifriction filler, viz. molybdenum disulphide, graphite, boron nitride or a mixture thereof; said material is produced, in accordance with the invention, by pressing a composition consisting of from 20 to 90 percent by weight of poly(butadiene) of molecular weight between 20,000 and 800,000 and from 10 to 80 percent by weight of said antifriction filler, the process being effected at a temperature in the range from 200.degree. to 330.degree. C. and a pressure of from 1,000 to 7,000 kg/sq.cm. The self-lubricating heat-resistant material of the invention exhibits thermal stability at temperatures of up to 350.degree. C., a stable coefficient of friction and excellent wear resistance in the temperature range from -150.degree. to +350.degree. C.

Self-lubricating heat-resistant material and process for manufacturing

The method of measuring dynamic characteristics of materials consists in obtaining, in the course of measurement, a control current which ensures oscillations of a specimen of a material at a preset amplitude and frequency. Then, real and imaginary components of the control current are discriminated, and two restoring currents are generated; these currents are summated, and the total current is used to control the movement of the specimen; after that, the real and imaginary components of the control current are discriminated for the second time, and their value, as well as the values of the restoring currents and the preset amplitude and frequency of the deformation of the specimen are used to calculate dynamic characteristics of the material.

Method of measuring dynamic characteristics of materials and device for

Growing community of inventors

Moscow, Russia

Georgy V Vinogradov