{"title":"新戊基聚酯油热氧化老化过程中胺类抗氧化剂的命运","authors":"A. Zeman, V. V. Roenne, Y. Trebert","doi":"10.1002/JSL.3000040302","DOIUrl":null,"url":null,"abstract":"The main products of the thermal-oxidative degradation of p, p'-di-tert- octyldiphenylamine, phenothiazine and 3,7-di-tert-octylphenothiazine (DODPA/PTZ/DOPTZ) in pentaerythritol ester at 200°C were isolated and identified. Recombination o f aminyl radicals giving various dehydrodimers and dehydro-trimers is obviously the dominating reaction in the primary stage of antioxidant depletion during ageing of inhibited ester oils. Minor degradation products include quinone imines, quinones, sulphoxides, phenoxazine and phenoxazone derivatives. Because of the complexity of the reactions product analyses are inevitably incomplete.","PeriodicalId":17149,"journal":{"name":"Journal of Synthetic Lubrication","volume":"3 1","pages":"179-201"},"PeriodicalIF":0.0000,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":"{\"title\":\"Fate of amine antioxidants during thermal oxidative ageing of neopentylpolyl ester oils\",\"authors\":\"A. Zeman, V. V. Roenne, Y. Trebert\",\"doi\":\"10.1002/JSL.3000040302\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The main products of the thermal-oxidative degradation of p, p'-di-tert- octyldiphenylamine, phenothiazine and 3,7-di-tert-octylphenothiazine (DODPA/PTZ/DOPTZ) in pentaerythritol ester at 200°C were isolated and identified. Recombination o f aminyl radicals giving various dehydrodimers and dehydro-trimers is obviously the dominating reaction in the primary stage of antioxidant depletion during ageing of inhibited ester oils. Minor degradation products include quinone imines, quinones, sulphoxides, phenoxazine and phenoxazone derivatives. Because of the complexity of the reactions product analyses are inevitably incomplete.\",\"PeriodicalId\":17149,\"journal\":{\"name\":\"Journal of Synthetic Lubrication\",\"volume\":\"3 1\",\"pages\":\"179-201\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1987-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Synthetic Lubrication\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/JSL.3000040302\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Synthetic Lubrication","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/JSL.3000040302","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Fate of amine antioxidants during thermal oxidative ageing of neopentylpolyl ester oils
The main products of the thermal-oxidative degradation of p, p'-di-tert- octyldiphenylamine, phenothiazine and 3,7-di-tert-octylphenothiazine (DODPA/PTZ/DOPTZ) in pentaerythritol ester at 200°C were isolated and identified. Recombination o f aminyl radicals giving various dehydrodimers and dehydro-trimers is obviously the dominating reaction in the primary stage of antioxidant depletion during ageing of inhibited ester oils. Minor degradation products include quinone imines, quinones, sulphoxides, phenoxazine and phenoxazone derivatives. Because of the complexity of the reactions product analyses are inevitably incomplete.
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