Living polymerization of phenylacetylene by novel rhodium catalysts. Quantitative initiation and introduction of functional groups at the initiating chain end

Macromolecules

Volumn 31, Issue 21, 1998, Pages 7572-7573

  Misumi, Yoshihiko ^a   Masuda, Toshio ^a  

^a KYOTO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

BLOCK COPOLYMERS; CATALYSTS; INITIATORS (CHEMICAL); MONOMERS; ORGANIC POLYMERS; RHODIUM; SYNTHESIS (CHEMICAL);

FUNCTIONAL GROUP; INITIATING CHAIN END; LIVING POLYMERIZATION; PHENYLACETYLENE;

POLYMERIZATION;

EID: 0032182223     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma981265p     Document Type: Article

References (20)

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16. 2] = 1.0 mM.; [Rh]:[Li]:[P] = 1:2:3). An excess amount of (triphenylvinyl)lithium was employed to compensate the loss caused by reaction with the moisture in the system.
17. The polymerization was initiated at 30 °C by addition of a monomer solution to the catalyst solution that was prepared just before use ([phenylacetylene]/[Rh] = 50) and quenched with a small amount of acetic acid after polymerization for 1 h. The polymer was precipitated into a large amount of methanol, filtered off, and dried to a constant weight.
18. n value calculated from the end-group analysis by NMR agreed well with the GPC value (vide infra).
19. 2C=C(Ph)Li was prepared by the method similar to that in note 5 and used for polymerization.
20. 3 induced living polymerization of phenylacetylene. This confirms the mechanism in Scheme 2.