|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
The role of the molecular organization of oligomers in the reactions of linear polyurethane formationстатья
Информация о цитировании статьи получена из
Web of Science
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: Stovbun E.V., Badamshina E.R., Greigor'eva V.A., Lodygina V.P., Kuzaev A.I., Baturin S.M.
- Журнал: VYSOKOMOLEKULYARNYE SOEDINENIYA SERIYA A & SERIYA B
- Том: 40
- Номер: 8
- Год издания: 1998
- Первая страница: 1286
- Последняя страница: 1293
- Аннотация: Effect of the molecular organization of oligomers on the kinetics of urethane formation and the molecular characteristics of products was studied for the interaction of 2,4-toluylene diisocyanate with oligobutadienediols of various molecular masses. It is shown that the kinetic parameters of reactions in the case of single- and two-stage synthesis are determined by changes in the ratio of the types of associated hydroxyl groups both in the initial oligobutadienediols (autoassociated and pi-bound) and in the course of reaction (autoassociated and pi-bound groups, or associates of the hydroxyl and urethane groups). Possible reasons for inversion of the dependence of the ratio of constants for the sequential process stages on the molecular mass of the oligomer are considered on the basis of notions of the structure of solution and associates.
- Добавил в систему: Бадамшина Эльмира Рашатовна