Abstract
Pd complexes with diimine ligands promote cyclopolymerization of diallylmalonates to afford a polymer having cyclopentane group. Herein we report the copolymerization of I with ethylene and a-olefins promoted by the Pd complexes. The copolymerization proceeds smoothly to give the polymer having trans- 1,2-disubstituted cyclopentane repeating unit. Content of I unit in the copolymer varies from 3 to 42% depending on the reaction conditions. The polyethylene with high content of I is linear, while decrease of I content renders the polymer branched. The copolymerization of I with propylene also proceeded to afford the copolymer with increased content of I. The copolymer of I with ethylene or propylene is rich in random sequence, and that with 1-hexene or 1-decene is of block structure. Other dienes such as diethyl diallylmalonate and N.N-diallyl sulfonamides also undergo copolymerization with ethylene and α-olefin in the presence of palladium catalysts to afford the copolymer having trans-l,2-disubstituted cyclopentane repeating unit.
Original language | English |
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Pages | 210 |
Number of pages | 1 |
State | Published - 2006 |
Externally published | Yes |
Event | 55th SPSJ Annual Meeting - Nagoya, Japan Duration: 24 May 2006 → 26 May 2006 |
Conference
Conference | 55th SPSJ Annual Meeting |
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Country/Territory | Japan |
City | Nagoya |
Period | 24/05/06 → 26/05/06 |
Keywords
- Copolymerization
- Cyclopolymerization
- Ethylene
- Pd catalyst
- α,ω-Dienes
- α-Olefin