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| Titel: |
Co-Oligomerization of Thienylcontaining Organic Cyclosiloxanes with 1,3-bis-(3-glycydoxypropyl)tetramethyldisiloxanes |
| Auteur: |
Khananashvili, L. M. Murachashvilli, D. U. Girgvliani, D. A. Vardosanidze, Ts. N. Tsomaya, N. I. Markarashvili, E. G. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 33 (1996) nr. 1-2 pagina's 37-45 |
| Jaar: |
1996-04-01 |
| Inhoud: |
The co-oligomerization of thienylcontaining organic cyclosiloxanes with 1,3-bis(3-glycydoxypropyl)tetramethyldisiloxanes initiated by the siloxane of tetramethilamonium is studied. It is found out, that the velocity of expenditure of thienylcontaining organocyclosiloxanes is described by the linear equations depending on its instant concentration. The constants of velocity of expenditure of organocyclosiloxanes is calculated and is shown, that they depend on the concentration of 1,3-bis(3-glycydoxypropyl)tetramethyldisiloxanes in the reaction mixture. The velocity limitation is reached, when the Si-O-Si bound in 1,3-bis(3-glycydoxypropyl)tetramethyl-disiloxanes is splitted. Using the method of gel permeable chromatography it is shown, that in the presence of polar admixture (dimethilphormamide) the system reaches the equilibrium much faster, producing the oligomeres of given molecular mass. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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