Strategies for accelerating cation radical chain polymerization are proposed and implemented. In one approach, unsymmetrical monomers are prepared which have a propenyl group to provide facile ionization by the aminium salt initiator and a vinyl group to provide diminished steric effects resulting i
Cation radical cycloaddition polymerization: Diels–Alder copolymerization
✍ Scribed by Nathan L. Bauld; J. Todd Aplin; Wang Yueh; Stephanie Endo
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 75 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0894-3230
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✦ Synopsis
The Diels-Alder cycloaddition copolymerization of a bis(diene) with ionizable bis(dienophiles) via a cation radical mechanism has been accomplished using tris(4-bromophenyl)aminium hexachloroantimonate as a catalyst in dichloromethane solvent. The reactions occur at 0°C and yield Diels-Alder polymers of M W up to ca. 10,000 and a polydispersity index ca. 2.
📜 SIMILAR VOLUMES
Cation radical chain cycloaddition polymerization, a fundamentally new addition polymerization method involving cation radical intermediates in each propagation step, is described and demonstrated. The cycloaddition reactions of appropriately constituted difunctional monomers, catalyzed by tris(4-br
The photoinduced electron transfer catalyzed radical cation Diels-Alder reaction between exocyclic dienes containing an N-O or N-N bond as an intentional cleaving point in the ring moiety [cf. (IV) and (X)] and indoles provides a rapid access to highly functionalized tetrahydrocarbazole derivatives