Determination of epoxy and isocyanate groups in the presence of each other

Analytical reactions for the determination of epoxy and isocyanate groups in the presence of each other in epoxy-isocyanate compositions were studied. For the determination of epoxy groups in the presence of isocyanate groups, a test with HBr in glacial acetic acid was proposed; acetic acid reacts with isocyanate groups and, hence, masks them. Isocyanate groups in the presence of epoxy groups were determined by potentiometric titration with a solution of piperidine in ethyl methyl ketone. The addition of toluene to the test solution decreases the fraction of the enol form of ethyl methyl ketone, which interferes with the determination.

Авторы
Evtushenko Yu.M.1 , Ivanov V.M.2 , Zaitsev B.E. 3
Редакторы
-
Издательство
-
Номер выпуска
5
Язык
Английский
Страницы
439-442
Статус
Опубликовано
Подразделение
-
Номер
-
Том
57
Год
2002
Организации
  • 1 AOZT Elektroizolit, Khot'kovo, Sergiev-Posad raion, Moscow Oblast, 141350, Russian Federation
  • 2 Department of Chemistry, Moscow State University, Vorob'evy gory, Moscow, 119899, Russian Federation
  • 3 Peoples Friendship University, ul. Ordzhonikidze 3, Moscow, 119517, Russian Federation
Ключевые слова
2 butanone; epoxide; isocyanic acid derivative; piperidine; toluene; addition reaction; analytic method; aqueous solution; article; experimental test; fractionation; molecular dynamics; molecular interaction; molecular mechanics; potentiometric titration; reaction analysis
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/203/