Controlled Polymerization of 1,3-Butadiene: Cobalt Catalytic Systems - Couverture souple

Nath, Dilip; Shiono, Takeshi

 
9783846558539: Controlled Polymerization of 1,3-Butadiene: Cobalt Catalytic Systems
Couverture souple
ISBN 10 : 3846558532 ISBN 13 : 9783846558539
Editeur : LAP LAMBERT Academic Publishing, 2011

Synopsis

The book described catalytic systems for living polymerization of 1,3-butadiene by CoX2 ( X = Halogens ) combined with MAO as a cocatalyst at 0, 10 and 18 ˚C. The uni-modal molecular weight distribution curves of the resulting polymers shifted toward higher molecular weight regions and became narrower with the increasing of the polymerization time. The number-average molecular weight increased linearly against polymerization time, while the polymer yield exponentially increased in the initial stage. As a consequence, the number of polymer chains calculated from the polymer yield and Mn value increased gradually with polymerization time to reach a steady value. These phenomena were interpreted based on a slow initiation system without any termination and chain transfer reaction. The kinetic analysis indicated that the rates of initiation were significantly influenced by the nature of the halides and descended in the following order, CoCl2≥CoBr2<

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2011
Langue
anglais
ISBN 10 
3846558532
ISBN 13 
9783846558539
Reliure
Broché
Nombre de pages
120
Coordonnées du fabricant
non disponible
Personne responsable
KreGa Onlinehandel GmbH
4950000000000
info@krega-onlinehandel.de

Birkenweg 31
Brakel
33034
Allemagne