Nanocomposites based on layered silicates and ultrahigh-molecular-mass polyethylene prepared via in situ polymerization

Khar’kova, E.M.; Mendeleev, D.I.; Korolev, Y.M.; Shklyaruk, B.F.; Gerasin, V.A.; Antipov, E.M.

Авторы: Khar’kova E.M., Mendeleev D.I., Korolev Y.M., Shklyaruk B.F., Gerasin V.A., Antipov E.M.
Журнал: Polymer Science, Series A
Том: 55
Номер: 8
Год издания: 2013
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 493
Последняя страница: 502
DOI: 10.1134/S0965545X1307002X
Аннотация: Nanocomposites based on ultrahigh?molecular?mass PE and layered silicates are prepared via in situ polymerization. The process is conducted in the suspension mode under mild conditions with the use of a conventional Ziegler–Natta catalyst and a bifunctional complex containing a nickel oligoallene component along with a titanium component. The fillers are four types of montmorillonite: nonmodified montmorillo? nite and three montmorillonites modified with various organic intercalants. In their presence, the activities of the catalysts appreciably increase (by a factor of 2–3). Composites containing 10–40 wt % aluminosilicates are prepared. The structures of the polymer matrix and composites are studied via X?ray diffraction. It is found that the degree of exfoliation of the filler depends not only on its amount but also on the type of mod? ifier and the type of catalytic system. The PE matrix with a molecular mass of (1.5–1.6) × 106 has a melting point of Tm = 141–143°C, a high enthalpy of melting, and a high degree of crystallinity. The IR?spectral stud? ies of the polymers synthesized with the bifunctional complex reveal the presence of branches in a chain, thereby suggesting the formation of linear PE with a medium density (0.938–0.946 g/cm3). Nanocomposites containing 10% aluminosilicate possess the best complex of mechanical properties relative to that of unfilled polyethylene
Добавил в систему: Менделеев Дмитрий Иванович

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ИНХС РАН

Nanocomposites based on layered silicates and ultrahigh-molecular-mass polyethylene prepared via in situ polymerizationстатья

Прикрепленные файлы