Добірка наукової літератури з теми "Neopolyol ester"
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Статті в журналах з теми "Neopolyol ester":
Aleksandrov, A. Yu, E. L. Krasnykh, S. V. Levanova, I. L. Glazko, and O. D. Lukin. "DEVELOPMENT OF TECHNOLOGY FOR PRODUCTION OF PLASTICIZERS ON THE BASIS OF TRIMETHYLOLPROPANE." Fine Chemical Technologies 14, no. 1 (February 28, 2019): 66–74. http://dx.doi.org/10.32362/2410-6593-2019-14-1-66-74.
Pyda, M., Manika Varma-Nair, W. Chen, H. S. Aldrich, R. H. Schlosberg, and B. Wunderlich. "Analysis of a symmetric neopolyol ester." Journal of Thermal Analysis 46, no. 3-4 (March 1996): 1093–111. http://dx.doi.org/10.1007/bf01983623.
Chen, W., A. Habenschuss, M. Pyda, Monika Varma-Nair, H. S. Aldrich, and B. Wunderlich. "Analysis of a symmetric neopolyol ester." Journal of Thermal Analysis 46, no. 3-4 (March 1996): 1113–32. http://dx.doi.org/10.1007/bf01983624.
Duong, Sandrine, Nora Lamharess-Chlaft, Mickaël Sicard, Bruno Raepsaet, Maria Elena Galvez, and Patrick Da Costa. "New Approach for Understanding the Oxidation Stability of Neopolyol Ester Lubricants Using a Small-Scale Oxidation Test Method." ACS Omega 3, no. 9 (September 4, 2018): 10449–59. http://dx.doi.org/10.1021/acsomega.8b00370.
Levanova, Svetlana V., Evgeniy L. Krasnykh, Svetlana V. Moiseeva, Sergei P. Safronov, and Ilya L. Glazko. "SCIENTIFIC AND TECHNOLOGICAL FEATURES OF SYNTHESIS OF NEW ESTER PLASTICIZERS BASED ON RENEWABLE RAW MATERIALS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, no. 6 (May 16, 2021): 69–75. http://dx.doi.org/10.6060/ivkkt.20216406.6369.
Дисертації з теми "Neopolyol ester":
Duong, Sandrine. "Modélisation de la dégradation de l’huile dans un turboréacteur." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS617.
Higher operating temperatures and lower oil consumption in future-generation of turbo engines may result in greater oil degradation than current engines. It is therefore necessary to follow the evolution of this degradation. This thesis aims to understand the oxidation by free radical chain reactions of a neopolyol ester lubricant in a turbo engine, focusing more particularly on the influence and behaviour of the two antioxidants additives (PAN, DODPA). Accelerated oxidation tests were carried out on the PetroOxy device in order to identify the degradation products, to prioritize the role of the antioxidant additives under these test conditions and to optimize the characterization techniques (HPLC and FTIR) used during this thesis. The decomposition into several representative mixtures of the lubricating oil made it possible to demonstrate that the consumption of the PAN was higher than that of DODPA. In fact, the products formed by the PAN are final products (the quantity of which keeps increasing over time) while the DODPA is able to produce compounds that also have an antioxidant effect. These will form and react with free radicals, which will slow down the consumption of the original antioxidant (DODPA). Studies conducted on the ageing of thin film oil on a flat plate have helped to better understand the mechanisms in an environment closer to that of the engine. The effectiveness of DODPA regarding PAN has been highlighted. In addition, the synergistic effect due to the combination of these two antioxidants in the oil has been demonstrated. Finally, the study on the influence of the parameters made it possible to calculate the kinetic constants useful for the formulation of the kinetic model, which provides the prediction of the consumption rate of the antioxidants on an inclined plate. A test bench reproducing the operating conditions of an oil system present in a turbo engine was designed and built during this thesis. The purpose of this assembly is to distinguish the 3 modes of ageing of the lubricant, which are : bulk oil (in the tank and the pipes), mist (at the exit of the bearings) and thin film (flowing on the walls of the enclosures) in order to study the oxidation mechanisms governing the 3 states. Finally, the comparison of the results obtained for each mode of ageing studied made it possible to determine a minimum antioxidant content required in the lubricant (i.e. 30 %) so that the neopolyol ester is not affected by the oxidation, in others words, the lubricant will keep a sufficient quality to ensure its operation in the turbo engine