Plastic Lubricants Research Articles

Optimization of the irradiation conditions of some control components and materials for the nuclear power plants and the radiation stability of certain types of plastic lubricants

Fail-safe operation of various safeguard devices, operational and auxiliary equipments and control components, e.g. servomotors other engines and various appliances, is required for a safe operation of nuclear power plants. Non-metal materials, control components, motors and other appliances have to be tested and their properties evaluated after γ-irradiation with doses corresponding to the assumed long term radiation commitment and also to the irradiation caused by an eventual accident. The radiation stability of greases used in devices exposed to high doses of the ionizing radiation presents a rather serious and important problem. The results of some tests and the evaluation of the properties of irradiated plastic lubricants are described.

The terminology of ?plastic lubricants? [lubricating greases

The terminology of ?plastic lubricants? [lubricating greases

Pressure distribution in hydrostatic extrusion dies

To be able to understand the detailed mechanics of plastic flow and lubrication during hydrostatic extrusion it is very desirable to be able to measure the precise pressure distribution along the length of the die. In the present work, experiments have been developed which enable this pressure distribution to be measured indirectly with reasonable accuracy and comparison is made between the distribution obtained experimentally during slow-speed hydrostatic extrusion of annealed copper and the distribution predicted by theoretical analysis. Very good agreement was obtained for the single geometry investigated.

The effect of the polarity of the dispersion medium on the structure and properties of plastic lubricants

1. An investigation has been made of some of the polar properties of intermediate products in the production of distillate oils, used as the liquid base for plastic lubricants. It has been shown that the extract from selective purification has the highest polarity and the highest ability to be polarized. 2. In the study of the properties of lithium, complex calcium, and silica-gel lubricants, prepared in media differing in polarity, it has been shown that not only the polarity of the medium, but also the ratio of the polarities of the medium and the thickener, are important. It has been shown that the strength of lithium lubricants, with an increase in the polarity of the medium, passes through a maximum, while, for complex calcium and silica-gel lubricants, there is an increase in the tensile strength.

623. Plastic lubricant for vacuum apparatus and joints: M D Bakaleinikov et al, USSR Patent No 300504, appl 24th Oct 1969, publd 19th May 1971

623. Plastic lubricant for vacuum apparatus and joints: M D Bakaleinikov et al, USSR Patent No 300504, appl 24th Oct 1969, publd 19th May 1971

Flow equation for plastic lubricants with account for the temperature factor

Flow equation for plastic lubricants with account for the temperature factor

Effect of the composition of the liquid base on the structure and properties of plastic lubricants

Effect of the composition of the liquid base on the structure and properties of plastic lubricants

Conference on plastic lubricants

Conference on plastic lubricants

Investigation of the temperature resistance of plastic lubricants under mechanical-dynamic conditions

1. An instrument and a method have been developed for evaluating the temperature resistance of plastic lubricants under mechanical-dynamic conditions, and investigations have been made of the stability of a group of hightemperature lubricants. 2. With testing under mechanical-dynamic conditions, there is a considerable lowering of the stability of the lubricating materials compared with tests under static conditions. The interreaction between the thickener and the dispersion medium, which occurs under friction conditions, exerts a great effect on the thermodynamic stability of the lubricants. 3. A reliable evaluation of the temperature resistance of plastic lubricants designed for operation in rocking bearings can be obtained only by testing them directly under mechanical-dynamic conditions.

Further Notes on Plastic Greases

THE ARTICLE entitled “Some Notes on the Classification of Plastic Lubricants”, by Dr. Eng. Xeno Liebl, Vol. 22, No. 3, of this Journal, stirred some interesting aspects of the lubricant range traditionally known as greases as well as posing some pointers to the routes along which appropriate discussion may be directed.

Effect of polarity of soaps and micellar binding energy on the structure and properties of plastic lubricants

1. The process of micell formation of HSt, LiSt, NaSt, AlSt, and PbSt has been investigated on an apparatus for determining the ohmic and polarization resistance of a film of lubricant when polarized by an intermittent current. It has been shown that the critical concentration for micell formation (CCMF) of lithium soaps is less than for soaps of other metals; this is associated with the high polarity of lithium stearate at the instant of micell formation. In accordance with this, lithium soaps have a smaller number of aggregations, better thickening (solubilizing) capability, and a higher micell-binding energy. 2. The change of the work function of electrons from the metal under the action of soaps of different metals has been determined. Soaps which are similar to cathodic-action inhibitors increase the electron work function; this is shown to the greatest degree in lithium soaps. The critical concentration for micell formation, the number of aggregations, solubilizing efficiency, and binding energy of the molecules in the micell, i.e., all the factors for micell formation of soaps, determine the structure and properties of the corresponding lubricants.

Use of plastic lubricants

Use of plastic lubricants

Laws governing the motion of plastic lubricants in round tubes

Based on an approximation of the flow curves for plastic lubricants, that is, formula (3), there have been obtained dependences permitting determination of the resistance to motion and of the velocity distribution over a cross section of the flow, with laminar motion of plastic lubricants in round tubes.

High temperature properties of plastic lubricants: Vamos, Von E., Mitterhauszer, F. and Flora, T. Schmiertechnik, Vol 14, No 6 (November–December 1967) p299

High temperature properties of plastic lubricants: Vamos, Von E., Mitterhauszer, F. and Flora, T. Schmiertechnik, Vol 14, No 6 (November–December 1967) p299

Radiation-resistant plastic lubricants based on sodium terephthalamide

1. A method has been developed for obtaining plastic lubricants based on sodium terephthalamide. 2. The authors have studied terephthalamide lubricants made from MS-20s or DS-11 mineral oil, MAS-35 synthetic hydrocarbon oil, and FM-1322/300 polymethylphenylsiloxane. 3. The complex of terephthalamide and sodium benzoate has a higher thickening capacity and (in the case of a 1∶0.5 molar ratio) forms systems with higher colloidal stabilities than sodium terephthalamide of equal concentration. 4. It is shown that a γ -ray dose of 108 rad does not greatly change the main physical and chemical properties of terephthalamide lubricants.

Plastic lubricants based on aminated bentonites. (in Russian) : E. D. Makeeva et. al., Khim. Tekhnol., Topliv.Masel, 9 (2) (1964) 30–36

Plastic lubricants based on aminated bentonites. (in Russian) : E. D. Makeeva et. al., Khim. Tekhnol., Topliv.Masel, 9 (2) (1964) 30–36

塑性加工における潤滑の問題点(塑性加工と潤滑)

塑性加工における潤滑の問題点(塑性加工と潤滑)

高温押出しと潤滑(塑性加工と潤滑)

高温押出しと潤滑(塑性加工と潤滑)

プレス成形と潤滑(塑性加工と潤滑)

プレス成形と潤滑(塑性加工と潤滑)

絞りと潤滑(塑性加工と潤滑)

絞りと潤滑(塑性加工と潤滑)