Search Results for “physical-mechanical properties of the rubber” – Collected book of scientific-technical articles

15.1.2024 Enhancing operability of the fuel system units in the hot climate conditions

Mon, 17 Jun 2024 07:43:36 +0000

15. Enhancing operability of the fuel system units in the hot climate conditions

Authors:

Udod A. M.¹, Skokov O. I.¹, Volovschikova V. V.¹, Shepel S. V.², Litvinova M. V.², Steshenko K. A.¹

Organization:

DINTEM Ukrainian Research Design-Technological Institute of Elastomer Materials and Products LLC¹; FED Joint Stock Company²

Page: Kosm. teh. Raket. vooruž. 2024, (1); 129-135

DOI: https://doi.org/10.33136/stma2024.01.129

Language: Ukrainian

Annotation: The article dwells on the problem of enhancement of durability for the mechanical rubber articles, which is directly related to the enhance of rubber resistance to various types of heat aging. Heat resistance during compression is most important for rubbers used for seals of various types: rings, collars, armored collars, gaskets for aviation and rocket technology hardware. Stress relaxation and the accumulation of relative residual deformation of rubbers, caused by the kinetic rearrangement of chemical bonds, are extremely sensitive to the influence of high temperatures. The main cause of the defects is the loss of elastic properties of the seals because of the accelerated heat aging of the nitrile group under conditions of long-term exposure to elevated temperatures in conditions of hot climate. The results of accelerated climatic testing of specimens of mechanical rubber articles, as well as the results of climatic endurance testing of the units for the period simulating 20-year service life are specified, and the main types of defects which result in the loss of performance properties of the mechanical rubber articles are as follows: great (up to 100%) residual deformation of intersections, cracking, loss of elasticity. The warranty life of fuel system units, made of ИРП-1078 nitrile rubber, does not exceed 12 years. Replacing the existing rubbers with rubbers created on the basis of more heat-bearing rubbers is the most promising way to improve the performance properties of the mechanical rubber articles under the high temperatures. The new D2301 rubber is based on fluorosiloxane rubber. It provides high thermal stability and, especially, the ability to maintain high performance properties for a long time under the simultaneous impact of hostile environment and high temperatures. The results of climatic endurance testing of fuel system units, equipped with rubber articles made of D2301 rubber, fully justify the increase of the specified service life of the specified units from 12 to 16 years. It is recommended to introduce D2301 rubber into the effective normative documentation and continue studies in order to extend the nomenclature of mechanical rubber articles made of D2301 rubber to provide the reliable sealing of units during the service life of 16 years or longer.

Key words: leaktightness of articles, fluorosiloxane rubber, rubber, temperature of the hot climate, physical-mechanical properties of the rubber, climatic endurance tests, elastic properties, warranty life

Bibliography:

Lepetov V. A., Yurtsev L. N. Raschet i konstruirovanie rezinovykh izdeliy. Moskva.
Khimia. 1971. 417 s.

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13.1.2018 On Selection of Materials for Creation of Modern LV Thermostating System Mating Hoses

Tue, 05 Sep 2023 06:52:56 +0000

13. On Selection of Materials for Creation of Modern LV Thermostating System Mating Hoses

Authors:

Bigun S. O.¹, Yevchik V. S.², Khorolskyi M. S.²

Organization:

Yangel Yuzhnoye State Design Office, Dnipro, Ukraine¹; State Enterprise DINTEM Ukrainian Research Design-Technological Institute of Elastomer Materials and Products²

Page: Kosm. teh. Raket. vooruž. 2018 (1); 72-84

DOI: https://doi.org/10.33136/stma2018.01.072

Language: Russian

Annotation: A series of materials is proposed for creation of space launch vehicle low-pressure air thermostating systems joints hoses. The topical issues are considered of materials designing with consideration for specific features of the hoses as special industrial rubber articles of launch vehicle launch sites.

Key words:

Bibliography:

1. Raw Stuff and Materials: Inf. Bull. М., 1999. No. 1. 44 p. https://doi.org/10.1007/978-1-4615-2802-9_3

2. Svitlichna R. F., Lotakov V. S., Chumicheva N. P. State and Prospects of Using Rubbers of New Generation in Rubber Industry of Ukraine: Scientific-Technical Report. К., 2001. No. 3. 13 p.

3. Nesterova L. A., Reznichenko S. V., Noskova L. F. et al. Experience of Using BNKS Paraffinate Nitrile Rubber in Formulations of Oil-Resistant Rubbers of Various Purpose at JSC “Uralsky Zavod RTI”. Med. Conf. on rubber: Collection of abstracts. М., 2000. No. 4. 121 p.

4. Investigation to Select Optimal Options of Replacing Raw Materials and Rubbers with Specifying Guaranteed Service and Storage Life of Rubber Products Being Components of Special Articles: Scientific–Technical Report DO-473-2002 UNUKTI DINTEM SE. 2002. 47 p.

5. Raw Stuff and Materials: Inf. Bull. М., 1999. No. 5. 55 p.

6. Raw Stuff and Materials: Inf. Bull. М., 2001. No. 3. 90 p.

7. Raw Stuff and Materials: Inf. Bull. М., 2001. No. 3. 96 p.

8. Raw Stuff and Materials: Inf. Bull. М., 2000. No. 3. 43 p.

9. Lotakov V. S., Yevchik V. S., Utlenko E. V. et al. Investigation of Operability of Rubbers with Adhesion Additives in Rubber-Metal Valves. Manufacture of Tires, Rubber Products and ATI. М., 1980. No. 4. P. 43-44.

10. Lotakov V. S., Yevchik V. S., Markova L. A. et al. Investigation of Alkali Impact on Adhesive Properties of Ethylene-Propylene Vulcanizing Agents. Caoutchouc and Rubber: Scientific–Technical Report. UNIKTI-DINTEM SE. 1981. No. 6. P. 18-19.

11. Svitlichna R. F., Bogutska E. O., Lotaakov V. S. et al. Technical Carbon of N Series. Prospects of Using in Rubber Mixtures of Caoutchoucs of New Generation: Scientific–Technical Report. К., 2006. No. 3. P. 17-20.

12. Yevchik V. S., Bogutskaya E. A., Khorolsky M. S. Investigations to Select Optimal Options of Replacing Raw Materials and Rubbers with Specifying Guaranteed Service and Storage Life of Rubber Products Being Components of 11K77 Article: Scientific–Technical Report DO-468-2000, UNIKTI-DINTEM SE. 2000. 55 p.

13. Nudelman Z. N., Lavrova L. N. Effective Vulcanization of Fluorine Rubbers. The III Ukr. International Scientific-Technical Conference of Rubber Industry Workers: Collection of abstracts. Dnepropetrovsk, 2000. 43 p.

14. Semyonov G. D., Yevchik V. S., Zaitseva T. P., Lotakov V. S. Prospects of Using New Vulcanizing Systems in Rubber Mixtures Based on Fluoroelastomers: Scientific–Technical Report. К., 2001. No. 3. 18 p.

15. Yevchik V. S., Zaitseva T. P., Khorolsky M. S. Investigations of Physical-Mechanical Characteristics of Rubbers Based on Caoutchoucs of New Generation: Scientific–Technical Report DO-387-89, DF VNIIEMI. Dnepropetrovsk, 2000. 61 p.

16. Belozerov N. V. Rubber Technology. М., 1979. 201 p.

17. Blokh G. A. Organic Rubber Vulcanization Accelerators. М.,1964. 156 p.

18. Big Reference Book of Rubber Industry Worker in 2 parts. Part 1. Rubbers and Ingredients / Under the general editorship of S. V. Reznichenko and Y. L. Morozov. М., 2012. 740 p.

19. Polyurethane Chemistry and Technology: Collection of conference papers. Manchester, 1967. 254 p.

20. Degteva T. G. et al. The Impact of Additives on Thermal Ageing of Rubbers and Model Gaskets Made of SKEP. Caoutchouc and Rubber. М., 1984. No. 8. P. 17-19.

21. Lepetov V. A. Rubber Products. L., 1976. 440 p.

22. Lepetov V. A., Yurtsev L. N. Calculations and Designing of Rubber Products and Production Accessories. М., 2009. 417 p.

23. New Prospective Hoses and Scarce and Commercially Inviable Rubbers, Ingredients and Materials: Recommendation No. 51-РМ-22/38/57/50-1050-83. М., 1983. 42 p.

24. Kornev A. E. et al. Technology of Elastomer Materials. М., 2009. 504 p.

25. Gerasimenko A. А. Protection of Machines from Biological Damages. M., 1984. 92 p.

26. Principles of Constructing Formulations and Using Rubbers for Rubber Products of Tropical Version: Recommendation No. 51-РМ-26-48-66. М., 1966. 56 p.

27. Assessment of Rubber Resistance to Damage by Thermites: Recommendation No. 51-РМ-4-622-75. М., 1975. 36 p.

28. Increasing Rubber Products Service Life in Conditions of Tropical Climate: Recommendation No. 51-РМ-4-697-76. М., 1976. 23 p.

29. Assessment of Rubber Resistance to Mould: Recommendation No. 51-РМ-4-407-73. М., 1976. 42 p.

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