MOLAR-MASS DISTRIBUTION OF POLYBUTADIENE SYNTHESIZED WITH NICKEL-BASED ZIEGLER-NATTA CATALYSTS .1.

Autor(en): SCHRODER, K
SCHMITZ, G
LECHNER, D
GEHRKE, K
Stichwörter: Polymer Science
Erscheinungsdatum: 1994
Herausgeber: HUTHIG & WEPF VERLAG
Journal: ANGEWANDTE MAKROMOLEKULARE CHEMIE
Volumen: 218
Startseite: 153
Seitenende: 162
Zusammenfassung: 
Cis-1,4-polybutadiene was produced by polymerization of 1,3-butadiene using a catalyst system formed by a two-step formation, namely (1) BF3 . O(C2H5)2 and Al(C2H5)3, (2) Ni (OOC8H15)2 and Al (C2H5)3 named in-situ-catalyst. The molar mass distributions (MMD) of the polybutadienes are investigated by means of size exclusion chromatography (SEC). The MMD's were fitted by a sum of Schulz-Flory-Functions (SFF). Changed catalyst formation and polymerization conditions influenced the parameters of the SFF. Changed areas and changed molar mass averages indicate a polymerization with more than one peak maximum and kind of active species and lead to a better understanding of the polymerization.
ISSN: 00033146
DOI: 10.1002/apmc.1994.052180111

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