Laser Mass Spectrometry Analysis of the Formation of Phosphazene-Containing Epoxy Oligomers

The main features of two methods for the synthesis of phosphazene-containing epoxy oligomers— namely, the methods based on oxidation of double bonds in organooxyphosphazenes and on the reaction of chlorocyclophosphazenes with diphenols and the subsequent interaction of the resulting hydroxy-aryloxy phosphazenes with epichlorohydrin—were examined. Using the example of hexa- and octa-eugenol derivatives of the corresponding cyclophosphazenes, optimal conditions were established for the oxidation of allyl groups of these compounds with peroxy acids and hexa- and octa-epoxide cyclophosphazenes were characterized. It was noted that the epoxidation of eugenol derivatives of a mixture of cyclophosphazenes with three to eight phosphazo groups is accompanied by side reactions leading to the formation of P–OH bonds and the partial opening of oxirane cycles. Bisphenol A phosphazene-containing oligoepoxides were synthesized both via the stage involving the formation of hydroxy-aryloxy cyclophosphazenes and their subsequent epoxidation with epichlorohydrin and via the direct interaction of chlorocyclophosphazenes with an excess of bisphenol A (BPA) in the presence of solid alkali. In the latter case, the resulting oligomers are mixtures of the conventional epoxide and phosphazene-containing epoxy oligomers. The content of the latter can be adjusted up to 50%. The synthesized oligomers contain 1–5% phosphorus. They can be cured by conventional hardeners to form flameproof or noncombustible compositions. © 2018, Pleiades Publishing, Ltd.

Авторы
Kireev V.V.1 , Bilichenko Y.V.1 , Borisov R.S. 2, 3 , Sirotin I.S.1 , Filatov S.N.1
Редакторы
-
Издательство
Pleiades Publishing
Номер выпуска
3
Язык
Английский
Страницы
243-262
Статус
Опубликовано
Подразделение
-
Номер
-
Том
60
Год
2018
Организации
  • 1 Mendeleev University of Chemical Technology, Moscow, 125047, Russian Federation
  • 2 Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, 119991, Russian Federation
  • 3 Peoples’ Friendship University of Russia, Moscow, 117198, Russian Federation
Ключевые слова
Mass spectrometry; Mixtures; Phenols; Synthesis (chemical); Cyclophosphazenes; Direct interactions; Epichlorohydrin; Epoxy oligomers; Eugenol derivatives; Laser mass spectrometry; Optimal conditions; Side reactions; Oligomers
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/6674/