Determination of phenylurethane and isocyanate groups in isocyanates

Reactions of phenylurethane and isocyanate groups of arylisocyanates with secondary amines are studied by IR spectrometry and potentiometric titration. It is found that the rate of the reaction between isocyanate groups and diethylamine is nearly independent of the solvent nature. When protophilic solvents are used, solvent molecules and isocyanate groups form associates, which interfere with the determination. Optimal conditions are determined for the determination of phenylurethane and isocyanate groups. Procedures are developed for determining mass fractions of isocyanate and phenylurethane groups when they are present simultaneously. © 1999 MAEe Cyrillic signK "Hayκa/Interperiodica".

Авторы
Редакторы
-
Издательство
-
Номер выпуска
3
Язык
Английский
Страницы
219-223
Статус
Опубликовано
Подразделение
-
DOI
-
Номер
-
Том
54
Год
1999
Организации
  • 1 ZAO Elektroizolit, Moscow oblast, 143350, Russian Federation
  • 2 Peoples Friendship University, ul. Ordzhonikidze 3, Moscow, 119517, Russian Federation
  • 3 Department of Chemistry, Moscow State University, Vorob'evy gory, Moscow, 117234, Russian Federation
Ключевые слова
-
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/567/