Influence of rare earth compounds on the anionic ring-opening polymerization of cyclosiloxanes
โ Scribed by G. Richard; A. -F. Mingotaud; D. Cardinaud; A. Soum
- Publisher
- Springer
- Year
- 1997
- Tongue
- English
- Weight
- 487 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0170-0839
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๐ SIMILAR VOLUMES
## Abstract The kinetics of the anionic ringโopening polymerization of the DD~NMe~ cyclodisilazane, initiated by benzyllithium, has been investigated in different experimental conditions. In nonโpolar solvents, the active centers are aggregated ion pairs which are in equilibrium with a small amount
## Abstract Methanol, in combination with a nonโionic phosphazene base, was used to initiate the polymerization of octamethylcyclotetrasiloxane. In bulk, an instantaneous and large increase in viscosity was observed upon addition of the initiator. In toluene solution, the equilibrium state was reac
Ring-opening polymerization of -caprolactone (CL) has been initiated with rare earth phenyl compounds in both bulk and solution. These rare earth phenyl initiators can give polycaprolactone (PCL) with high yield and high molecular weight. The polymerization mechanism is through a coordination-deprot
## Abstract The kinetics of the anionic ringโopening polymerization of several cyclodisilazanes substituted with different groups on silicon atoms has been investigated in toluene/tetrahydrofuran (THF) using benzyllithium as initiator. Two different behaviours were observed: for hindered substituen