By A I Sviridewok, A F Kilmovich, V N Kestelman
A variety of sensible difficulties attached to triboelectric phenomena stay unsolved in either the fabrication and behaviour of polymer threads and materials in quite a few business articles. utilizing the result of distinct experiments conducted within the nations of the previous Soviet Union, this quantity fills a niche within the technological know-how of tribology, featuring primary details at the nature of actual and chemical strategies governing and accompanying tribodeformation and tribodisintegration of polymers. info on electrophysical phenomena equivalent to touch electrification and emergence of the electret country in polymer fabrics also are supplied.
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Extra info for Electrophysical phenomena in the tribology of polymers
The temperature of the metallic insert is measured by thermocouple, and the results are registered by a recording potentiometer. A special stand was designed to investigate the appearance of the electret states in polymers during friction against metals in the vacuum (Fig. 7). The friction unit is placed in the working space of the multipurpose vacuum unit. The specimen is secured on a heating table mounted on a resilient beam. 3 x 10-2. 3 x 10-3 Pa is created. The force of friction is read by strain gauges glued to the strain beam.
2 (Russian translation), Moscow, 1984. 65. V. ‘Electron Processes on Semiconductor Surfaces’ (in Russian), Moscow, 1971. 66. F. S. 6, 52–58. 67. Krupp, H. Static Electrification Conf. , no. 11, Inst. Physics, London, 1971, 1– 15. 68. M. L. Sci.. of Appl. 3, 930–939. 69. Cessler, G. in ‘Electrets’, (Russian translation), Moscow, 1983, p. 8–104. 70. Bauser, H. Kunststoffe, 1972, 62, 192. 71. Seggern, H. Journal Appl. , 1979, 50, 2817. 72. Yu. Proc. V Symp. on Mech. Emission and Mech. Chem. of Solids (in Russian), Tallinn, 1975, 10–11 and 70.
Then, any known technique is employed to depolarize the specimen and its full free charge is determined as After that, the center of distribution is determined using the expression Copyright © 1999 OPA 44 EXPERIMENTAL TECHNIQUES This technique is applicable provided there is no dipole or any other type of space polarization. 0 K/min), and a heated measuring cell. 5. Block-diagram of set-up for thermal electret analysis (thermosimulated current measurements): 1, specimen; 2, lower electrode with built-in thermocouple; 3, thermocouple; 4, measuring cell; 5, programmable heater; 6, upper measuring electrode; 7, automatic temperature controller; 8, coordinate recorder; 9, current measuring unit (electromeasuring amplifier).