Abstract
Copolymerization of ethylene or propylene and norbornene (NB) was carried out with stereospecific zirconocene catalysts rac-ethylenebis(indenyl)zirconium dichloride, rac-dimethylsilylenebis(indenyl)zirconium dichloride (2), rac-dimethyl-silylenebis(2-methylindenyl)zirconium dichloride, and diphenylmethylene(cyclopentadienyl)(9-fluorenyl)zirconium dichloride combined with cocatalysts at 40°C. Temperature-rising elution fractional of the copolymers was carried out with cross-fractionation chromatography with o-dichlorobenzene as a solvent, and a broad distribution of the copolymer composition was detected. The fraction eluted at lower temperature contained higher NB. The effect of the polymerization time was examined in the ethylene-NB copolymerization with catalyst 2, and the higher-temperature elution fraction increased with increasing polymerization time.
| Original language | English |
|---|---|
| Pages (from-to) | 441-448 |
| Number of pages | 8 |
| Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
| Volume | 41 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2003 Feb 1 |
| Externally published | Yes |
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Keywords
- Composition distribution
- Copolymerization
- Norbornene
- Polyethylene
- Polypropylene
- Temperature-rising elution fractionation
ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics
Cite this
Composition distribution of ethylene or propylene-norbornene copolymers obtained with zirconocene catalysts. / Naga, Naofumi; Imanishi, Yukio.
In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 41, No. 3, 01.02.2003, p. 441-448.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Composition distribution of ethylene or propylene-norbornene copolymers obtained with zirconocene catalysts
AU - Naga, Naofumi
AU - Imanishi, Yukio
PY - 2003/2/1
Y1 - 2003/2/1
N2 - Copolymerization of ethylene or propylene and norbornene (NB) was carried out with stereospecific zirconocene catalysts rac-ethylenebis(indenyl)zirconium dichloride, rac-dimethylsilylenebis(indenyl)zirconium dichloride (2), rac-dimethyl-silylenebis(2-methylindenyl)zirconium dichloride, and diphenylmethylene(cyclopentadienyl)(9-fluorenyl)zirconium dichloride combined with cocatalysts at 40°C. Temperature-rising elution fractional of the copolymers was carried out with cross-fractionation chromatography with o-dichlorobenzene as a solvent, and a broad distribution of the copolymer composition was detected. The fraction eluted at lower temperature contained higher NB. The effect of the polymerization time was examined in the ethylene-NB copolymerization with catalyst 2, and the higher-temperature elution fraction increased with increasing polymerization time.
AB - Copolymerization of ethylene or propylene and norbornene (NB) was carried out with stereospecific zirconocene catalysts rac-ethylenebis(indenyl)zirconium dichloride, rac-dimethylsilylenebis(indenyl)zirconium dichloride (2), rac-dimethyl-silylenebis(2-methylindenyl)zirconium dichloride, and diphenylmethylene(cyclopentadienyl)(9-fluorenyl)zirconium dichloride combined with cocatalysts at 40°C. Temperature-rising elution fractional of the copolymers was carried out with cross-fractionation chromatography with o-dichlorobenzene as a solvent, and a broad distribution of the copolymer composition was detected. The fraction eluted at lower temperature contained higher NB. The effect of the polymerization time was examined in the ethylene-NB copolymerization with catalyst 2, and the higher-temperature elution fraction increased with increasing polymerization time.
KW - Composition distribution
KW - Copolymerization
KW - Norbornene
KW - Polyethylene
KW - Polypropylene
KW - Temperature-rising elution fractionation
UR - http://www.scopus.com/inward/record.url?scp=0037318585&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037318585&partnerID=8YFLogxK
U2 - 10.1002/pola.10589
DO - 10.1002/pola.10589
M3 - Article
VL - 41
SP - 441
EP - 448
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
SN - 0887-624X
IS - 3
ER -