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Zirconocene-catalyzed copolymerizations of ethylene with 5-methyl-1,4-hexadiene as non-conjugated diene
| Content Provider | Semantic Scholar |
|---|---|
| Author | Jin, Yong Hyun Im, Seung Soon Kim, Sang Seob Kwak, Soon Jong Kim, Kwang Ung Kim, Keon Hyeong Kim, Jungahn |
| Copyright Year | 2002 |
| Abstract | The mixtures of non-conjugated dienes, 4-methyl-1,4-hexadiene and 5-methyl-1,4-hexadiene (MHD), were successfully synthesized by the reaction of isoprene with ethylene using Fe(III)-based catalyst in toluene. The conversion was over 96 mol% on the basis of the initial amount of isoprene used. The production yield for MHD was nearly 50 mol%, the other was polyisoprene. The mixtures were successfully copolymerized with ethylene by using zirconium-based metallocenes. The products were characterized by the combinations of gas chromatography, high temperature gel permeation chromatography,1H NMR,13C NMR, high temperature1H NMR, UV/Visible spectroscopy, and differential scanning calorimetry. It was found that 5-methyl-1,4-hexadiene was active enough to be incorporated into the copolymer chain but the corresponding isomeric material, 4-methyl-1,4-hexadiene, was inactive in metallocene-catalyzed copolymerizations. Specifically, in the zirconocene-catalyzed copolymerizations of ethylene with MHD,ansa-structure catalysts seem to be more efficient than non-bridged type zirconocene. The degree of incorporation of MHD in the resulting copolymers was able to be controlled by the amount of non-conjugated dienes used initially. |
| Starting Page | 97 |
| Ending Page | 102 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/BF03218297 |
| Volume Number | 10 |
| Alternate Webpage(s) | https://www.cheric.org/PDF/MMR/MR10/MR10-2-0097.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/BF03218297 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
