From experimental data, a conclusion is drawn on chain character of cyclo-olefin ring-opening polymerization. It was suggested that the active centres of this process are carbene complexes of transition metals (W, Mo, Re). The confirmation of this view comes from studies on the initiation of ring-op
Stereoselectivity of the ring-opening polymerization of cyclo-octadiene-1,5
β Scribed by A.I. Syatkowsky; T.T. Denisova; E.L. Abramenko; A.S. Khatchaturov; B.D. Babitsky
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 350 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0032-3861
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π SIMILAR VOLUMES
Abstraet--Cyclo-olefins may be polymerized under very mild conditions to give linear polymers using a mixture of WCI6 and A1Br3. No metal alkyls are involved. The polymers contain no vinylic unsaturation. \* Commercial product, 60 per cent trans, 30 per cent cis, I0 per cent saturated material. t T
## Abstract The anionic ringβopening polymerization of a model monomer of cyclodisilazanes 1, initiated with both organosodium and organolithium initiators, was investigated. Under specific conditions, this polymerization exhibits all the characteristics of a living process. Indeed, whatever the ex