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- Title
The Structure of Cationic Polyisoprene: Branching versus Cyclization.
- Authors
Rozentsvet, Victor A.; Kozlov, Valery G.; Korovina, Nelly A.; Stotskaya, Olesya A.; Gnezdilov, Oleg I.; Kostjuk, Sergei V.
- Abstract
The structure, molecular weight, and molecular weight distribution (MWD) of polyisoprene fractions, which were obtained during the fraction of polyisoprene with broad MWD ( Mw/ Mn = 25.6) synthesized with tBuCl/TiCl4 initiating system have been investigated. It is established that chain transfer to polymer leading to branched macromolecules is responsible for the formation of polyisoprene with broad MWD and reduced unsaturation. It is shown for the first time that unsaturation decreased while the content of head and end groups in a single macromolecule increased with increasing molecular weight of polyisoprene fraction. The unsaturated part of the polymer chain consists of presumably trans-1,4-units independently of the molecular weight of polyisoprene fraction.
- Subjects
POLYISOPRENE; MOLECULAR weights; MOLECULAR structure; CHAIN transfer (Chemistry); RING formation (Chemistry); ADDITION polymerization
- Publication
Macromolecular Chemistry & Physics, 2016, Vol 217, Issue 16, p1860
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201600129