Premium
Copolymerization of poly(propylene) macromonomer with ethylene by ( tert ‐butanamide)dimethyl(tetramethyl‐η 5 ‐cyclopentadienyl)silanetitanium dichloride/methylaluminoxane catalyst
Author(s) -
Shiono Takeshi,
Moriki Yuji,
Ikeda Tomiki,
Soga Kazuo
Publication year - 1997
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1997.021981020
Subject(s) - macromonomer , methylaluminoxane , polymer chemistry , copolymer , polymerization , materials science , ethylene , chemistry , polymer , catalysis , metallocene , organic chemistry
The copolymerization of ethylene and a poly(propylene) macromonomer, the number‐average polymerization degree ( P n ) of which was about 11, was conducted with ( tert ‐butanamide)dimethyl(tetramethyl‐η 5 ‐cyclopentadienyl)silanetitanium dichloride (CGC‐Ti) combined with methylaluminoxane. The rate of ethylene consumption is increased by adding the macromonomer when copolymerization was carried out at 40°C, whereas such rate enhancement could not be observed at 90°C. It was found that the increase of ethylene polymerization rate is accompanied by the incorporation of the macromonomer. Based on differential scanning calorimetry (DSC) and 13 C NMR measurements of the produced polymers, it was proved that the poly(propylene) macromonomer was copolymerized with the present CGC‐Ti catalyst and the P n value of the macromonomer incorporated in the copolymer does not influence the conversion of the macromonomer.