Automated control of thermal vacuum impregnation and swelling of oil- and gasoline-resistant elastomers

Polymeric materials used in the rolling stock are currently subject to increased requirements for durability. We present a method for accelerated and automated rapid analysis of the impregnation of polymeric materials used in various aggressive environments to determine their service life as sealing products. The results of studying changes in the physical and mechanical properties of samples are given on the example of elastomeric materials used as separating and sealing materials made of oil- and petrol resistant rubber MBS-S. Hydrocarbons based on mineral oil products with different viscosity coefficients were used as working media. It is shown that the time of impregnation of the MBS-S polymer, spent on testing according to the standard method, exceeds more than 10 times the standard terms rated for repair and maintenance. Tests using the developed express filling unit showed a reduction of the impregnation time to a level acceptable in production. The derived mathematical dependences for the process of filling MBS-S oil and petrol resistant rubber with a standard working fluid and automation of filling control make it possible to predict changes in the resistance of polymeric materials. The results obtained can be used in developing database of the swelling dynamics for various materials and predicting the service life of polymers in an aggressive environment of various etiology.

1. Kablov E. N. Strategic directions for the development of materials and technologies for their processing until 2030 / Aviats. Mater. Tekhnol. 2020. N 5. P. 7 – 17 [in Russian].

2. Dick J. S. Rubber Technology: Formulation and Testing. — St. Petersburg: Nauchnye osnovy i tekhnologii, 2020. — 620 p. [Russian translation].

3. Martin J. M., Smith W. K. Production and application of rubber products. — St. Petersburg: Professiya, 2019. — 480 p. [Russian translation].

4. Butorin D. V., Chuklay I. V. Technology of oil filling of polymeric and composite antifriction materials / Proc. of the VII Int. Sci.-Pract. Conf. «Transport infrastructure of the Siberian region». Vol. 2. — Irkutsk: IrGUPS, 2010. P. 490 – 495 [in Russian]. DOI: 10.1016/0375-6742(74)90001-6

5. Filippenko N. G., Butorin D. V., Livshits A. V. Determination of phase and relaxation transitions in polymeric materials / Avtom. Sovr. Tekhnol. 2017. Vol. 71. N 4. P. 171 – 175 [in Russian].

6. Livshits A. V., Larchenko A. G., Filatova S. N. High-frequency electrothermal treatment of non-metallic secondary raw materials / Nauka Obraz. 2014. N 6. P. 55 – 65 [in Russian].

7. Filippenko N. G., Butorin D. V., Livshits A. V. Automation of measuring the temperature of polymeric material during high-frequency electrothermal heating / Sovr. Tekhnol. Sist. Anal. Model. 2017. N 1(53). P. 96 – 103 [in Russian].

8. Filippenko N. G., Livshits A. V. Automated studies of the process of impregnation of elastomers / Élektrotekhnol. Élektrooborud. APK. 2022. Vol. 69. N 1(46). P. 72 – 78 [in Russian]. DOI: 10.22314/2658-4859-2022-69-1-72-78

9. Morchiladze I. G., Nikodimov A. P., Sokolov M. M., Tretyakov A. V. Railway tanks. — Moscow: IBS-Holding, 2016. — 516 p. [in Russian].

10. Bakanin D., Bychkovsky V., Butorin D. Development and automation of the device for determination of thermophysical properties of polymers and composites / Advances in Intelligent Systems and Computing. 2020. Vol. 982. P. 731 – 740. DOI: 10.51955/23121327 2022_2_19

11. Kovaleva L. A., Livanova N. M., Ovsyannikov N. Ya. Investigation of the swelling of rubbers from butadiene nitrile rubbers in the non-polar solvent n-heptane / Proc. of the XVIII Int. Sci.-Pract. Conf «Rubber industry. Raw material. Materials. Technologies». — Moscow: NITs NIIShP, 2021. P. 63 – 66 [in Russian].

12. Maskulyuinate O. E., Morozov Yu. L. Influence of the method of introducing a plasticizer on the properties of BNKS paraffin rubbers and standard rubbers based on them / Kauch. Rez. 2016. N 3. P. 14 – 17 [in Russian].

13. Anisimov B. Yu., Dybman A. S., Imyanitov L. S., Polyakov S. A. Hydrogenation of butadiene-nitrile rubbers / Kauch. Rez. 2017. N 2. P. 32 – 38 [in Russian].

14. Chaikun A. M., Eliseev I. S., Naumov M. A., Venediktova O. A. Features of building recipes for frost-resistant rubber / Aviats. Mater. Tekhnol. 2015. N 3. P. 53 – 55 [in Russian].

15. Filippenko N. G. Investigation of the mechanical characteristics of polyamide materials of separators for axle boxes of rolling stock / Zavod. Lab. Diagn. Mater. 2017. N 12. P. 43 – 47 [in Russian].

16. Dumchev I. S., Larchenko A. G., Popov S. I., et al. Restoration of polyamide separators of bearings of the axle box unit of the rolling stock of Russian Railways / Mol. Uch. 2012. N 12. P. 48 – 51 [in Russian]. DOI: 10.15826/analitika.2012.19.2.009

17. Efimov V. A., Shvedkova A. K., Korenkova T. G., et al. Study of polymeric structural materials under the influence of climatic factors and loads in laboratory and natural conditions / Tr. VIAM. 2021. N 1. Art. 05 [in Russian]. DOI: 10.18577/2307-6046-2022-0-11-16-26.

18. Kablov E. N. Chemistry in aviation materials science / Ross. Khim. Zh. 2018. N 1. P. 31 – 41 [in Russian].

19. Coat J. Polymer heterogeneity in waterborne coatings / Technol. Res. 2010. Vol. 7. N 1. P. 1 – 21. DOI: 10.1007/s11998-009-9201-5

20. Tomba J., Xiaodong Y., Fugang L. Polymer blend latex films: Miscibility and holymerdiffusion studied by energy transfer / Polymer. 2008. Vol. 49. N 8. P. 2055 – 2064.