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Gas phase polymerization of 1,3‐butadiene with supported neodymium‐based catalyst: Investigation of molecular weight
Author(s) -
Ni Xufeng,
Li Junfei,
Zhang Yifeng,
Shen Zhiquan
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20198
Subject(s) - polybutadiene , polymerization , molar mass distribution , catalysis , polymer chemistry , neodymium , polymer , phase (matter) , solution polymerization , molar ratio , chemistry , materials science , copolymer , organic chemistry , laser , physics , optics
The gas phase polymerization of 1,3‐butadiene (Bd), with supported catalyst Nd(naph) 3 /Al 2 Et 3 Cl 3 /Al(i‐Bu) 3 or/and Al(i‐Bu) 2 H, was investigated. The polymerization of Bd with neodymium‐based catalysts yielded cis ‐1,4 (97.2–98.9%) polybutadiene with controllable molecular weight (MW varying from 40 to 80 × 10 4 g mol −1 ). The effects of reaction temperature, reaction time, Nd(naph) 3 /Al(i‐Bu) 3 molar ratio, and cocatalyst component on the catalytic activity and molecular weight of polymers were examined. It was found that there are two kinds of active sites in the catalyst system, which mainly influenced the MW and molecular weight distribution of polybutadiene. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1945–1949, 2004