Synthesis of end-functionalized polymers by means of living anionic polymerization. 8. Reactions of living anionic polymers with α,ω-dihaloalkanes

Macromolecules

Volumn 30, Issue 12, 1997, Pages 3484-3489

  Hirao, Akira ^a   Tohoyama, Mieko ^a   Nakahama, Seiichi ^a  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

HALOGEN COMPOUNDS; MOLECULAR WEIGHT; MOLECULAR WEIGHT DISTRIBUTION; PARAFFINS; POLYISOPRENES; POLYSTYRENES; SUBSTITUTION REACTIONS;

DIMERIZATION; LIVING POLYMERIZATION;

ANIONIC POLYMERIZATION;

EID: 0031170342     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma970138a     Document Type: Article

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24. It was observed under the conditions employed here that the turner was not always but often formed in yields of less than 3% even by quenching with degassed methanol. This is probably produced as a result of an elimination of LiH from the living polymer to afford the polymer with a C=C end group, followed by a reaction with another living polymer to produce the dimer. The dimer thus formed is difficult to be distinguished from that produced by the coupling reaction of α,ω-dihaloalkane with 2 equiv of living polymer. The results should be therefore evaluated to take this into consideration.
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