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«Self-Organizing cyclolinear organosilicon polymers in bulk and on the surface of water (Review)статья
Информация о цитировании статьи получена из
Scopus
Дата последнего поиска статьи во внешних источниках: 14 августа 2017 г.
- Авторы: Makarova N.N., Astapova T.V., Buzin A.I., Polishchuk A.P., Chizhova N.V., Petrova I.M.
- Журнал: Int. J. Mol. Med. Adv. Sci
- Том: 14
- Год издания: 2013
- Первая страница: 18215
- Последняя страница: 18238
- DOI: 10:3390/ijms140918215
- Аннотация: Cyclolinear organocarbosiloxane polymers with varying content and location of (CH2)n groups in monomer unit were synthesized by reactions of heterofunctional polycondensation and polyaddition of difunctional organocyclosiloxanes and organocyclocarbosiloxanes. Their bulk properties were studied by DSC and X-ray structural analysis. It was shown that on introduction of CH2 groups in methylcyclohexasiloxane unit, polymer retains the ability to self-organization with formation of mesomorphic state in a wide temperature range, while on introduction of (CH2)2 fragments in a cyclotetrasiloxane unit or in a bridge connecting two methylcyclotetra(hexa)siloxane units it does not. Comparison of the X-ray data of dihydroxy derivatives of decamethylcyclohexasiloxane and decamethyl-5-carbocyclohexasiloxane with packing of cyclolinear organosilicon polymers in bulk shows that polymer inherits layered type of crystalline structure typical for monomer. Langmuir films of cyclolinear polymethylcarbosiloxanes with different design of monomer units were studied as well. It was revealed that all polymers form monomolecular films at air/water interface, excluding the one having hydrophobic fragment longer than hydrophilic one. The ability to form multilayers depends on the surroundings of Si atom in the bridge between the cycles.
- Добавил в систему: Макарова Наталия Николаевна