Abstract
The copolymerization of ethylene and cycloolefins [cyclopentene (CPE), cyclohexene (CHX), cycloheptene (CHP), cyclooctene (COT), cyclododecene (CDO), norbornene (NB), and 5,6-dihydrodicyclopentadiene HDCPD] and cyclodiolefins [1,3-cyclopentadiene (CPD), 1,4-cyclohexadiene (CHD), 1,5-cyclooctadiene (COD), 2,5-norbornadiene (NBD), and dicyclopentadiene (DCPD)] was investigated with a constrained-geometry catalyst, dimethylsilylene(tetramethylcyclopentadienyl)(N- tert-butyl)titanium dichloride, with methyl isobutyl aluminoxane as a cocatalyst. In the copolymerization with cycloolefins, the olefins, except for CHX, CDO, and HDCPD, were copolymerized via the 1,2-insertion mode with the following reactivity: NB > CHP > COT > CPE. In the copolymerization with cyclodiolefins, corresponding copolymers, except for copolymerization with CHD, were obtained. A crosslinking fraction was detected in the copolymers with COD and NBD. The reactivity of the cyclodiolefins, except for COD, was higher than that of the cycloolefins. CPD was copolymerized via 1,2-insertion, 1,4-insertion or 1,2-insertion of dimerized DCPD. The copolymerization with COD showed peculiar behavior under the copolymerization condition of a high COD concentration in the feed.
| Original language | English |
|---|---|
| Pages (from-to) | 1285-1291 |
| Number of pages | 7 |
| Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
| Volume | 43 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2005 Mar 15 |
| Externally published | Yes |
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Keywords
- Constrained-geometry catalyst
- Copolymerization
- Cyclodiolefin
- Cycloolefin
- Ethylene
- Polyolefins
- Ziegler-Natta polymerization
ASJC Scopus subject areas
- Polymers and Plastics
- Materials Chemistry
Cite this
Copolymerization of ethylene with cycloolefins or cyclodiolefins by a constrained-geometry catalyst. / Naga, Naofumi.
In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 43, No. 6, 15.03.2005, p. 1285-1291.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Copolymerization of ethylene with cycloolefins or cyclodiolefins by a constrained-geometry catalyst
AU - Naga, Naofumi
PY - 2005/3/15
Y1 - 2005/3/15
N2 - The copolymerization of ethylene and cycloolefins [cyclopentene (CPE), cyclohexene (CHX), cycloheptene (CHP), cyclooctene (COT), cyclododecene (CDO), norbornene (NB), and 5,6-dihydrodicyclopentadiene HDCPD] and cyclodiolefins [1,3-cyclopentadiene (CPD), 1,4-cyclohexadiene (CHD), 1,5-cyclooctadiene (COD), 2,5-norbornadiene (NBD), and dicyclopentadiene (DCPD)] was investigated with a constrained-geometry catalyst, dimethylsilylene(tetramethylcyclopentadienyl)(N- tert-butyl)titanium dichloride, with methyl isobutyl aluminoxane as a cocatalyst. In the copolymerization with cycloolefins, the olefins, except for CHX, CDO, and HDCPD, were copolymerized via the 1,2-insertion mode with the following reactivity: NB > CHP > COT > CPE. In the copolymerization with cyclodiolefins, corresponding copolymers, except for copolymerization with CHD, were obtained. A crosslinking fraction was detected in the copolymers with COD and NBD. The reactivity of the cyclodiolefins, except for COD, was higher than that of the cycloolefins. CPD was copolymerized via 1,2-insertion, 1,4-insertion or 1,2-insertion of dimerized DCPD. The copolymerization with COD showed peculiar behavior under the copolymerization condition of a high COD concentration in the feed.
AB - The copolymerization of ethylene and cycloolefins [cyclopentene (CPE), cyclohexene (CHX), cycloheptene (CHP), cyclooctene (COT), cyclododecene (CDO), norbornene (NB), and 5,6-dihydrodicyclopentadiene HDCPD] and cyclodiolefins [1,3-cyclopentadiene (CPD), 1,4-cyclohexadiene (CHD), 1,5-cyclooctadiene (COD), 2,5-norbornadiene (NBD), and dicyclopentadiene (DCPD)] was investigated with a constrained-geometry catalyst, dimethylsilylene(tetramethylcyclopentadienyl)(N- tert-butyl)titanium dichloride, with methyl isobutyl aluminoxane as a cocatalyst. In the copolymerization with cycloolefins, the olefins, except for CHX, CDO, and HDCPD, were copolymerized via the 1,2-insertion mode with the following reactivity: NB > CHP > COT > CPE. In the copolymerization with cyclodiolefins, corresponding copolymers, except for copolymerization with CHD, were obtained. A crosslinking fraction was detected in the copolymers with COD and NBD. The reactivity of the cyclodiolefins, except for COD, was higher than that of the cycloolefins. CPD was copolymerized via 1,2-insertion, 1,4-insertion or 1,2-insertion of dimerized DCPD. The copolymerization with COD showed peculiar behavior under the copolymerization condition of a high COD concentration in the feed.
KW - Constrained-geometry catalyst
KW - Copolymerization
KW - Cyclodiolefin
KW - Cycloolefin
KW - Ethylene
KW - Polyolefins
KW - Ziegler-Natta polymerization
UR - http://www.scopus.com/inward/record.url?scp=15544374383&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=15544374383&partnerID=8YFLogxK
U2 - 10.1002/pola.20575
DO - 10.1002/pola.20575
M3 - Article
VL - 43
SP - 1285
EP - 1291
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
SN - 0887-624X
IS - 6
ER -