Ethylene/Norbornene Copolymerization with iPr(Cp)(Flu)ZrCl2 Catalyst: Effect of MAO Cocatalyst and 3rd Monomer |
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| Authors: | Keun-byoung Yoon Yeon Seok Choi Seok Kyun Noh Dong-ho Lee |
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| Affiliation: | 1. Department of Polymer Science, Kyungpook National University, Daegu 702-701, Korea;2. School of Chemical Engineering and Technology, Yeungnam University, Gyeongsan 712-749, Korea |
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| Abstract: | The copolymerization of ethylene and norbornene (N) was carried out with iPr(Cp)(Flu)ZrCl2 catalyst and modified methylaluminoxane (MMAO) cocatalyst. The catalytic activity was dependent on the structure of MMAO, i.e., MMAO-4 exhibited higher catalyst activity than MMAO-3A containing more i-butyl groups. The glass transition temperature (Tg) and the composition of the produced copolymer were not affected by MMAO type. With styrene derivatives as 3rd monomer, Tg of copolymer increased while the catalytic activity decreased. With the addition of 3rd monomer, not only the content of 3rd monomer but also the content of N increased. |
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| Keywords: | ansa-metallocene catalyst copolymerization ethylene and norbornene MMAO cocatalyst 3rd monomer |
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