Copolymerization kinetics obtained by stopped-flow polymerization
Ethylene--propylene copolymerization was carried out over MgCl sub 2 -supported TiCl sub 4 catalyst with two different reaction schemes; i.e., stopped-flow copolymerization (SFC) and continuously-purged copolymerization (CPC). The reactivity ratio for each monomer was evaluated by Fineman--Ross and...
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| Veröffentlicht in: | Polymer bulletin (Berlin, Germany) Germany), 1990-02, Vol.23 (2), p.191-197 |
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| container_title | Polymer bulletin (Berlin, Germany) |
| container_volume | 23 |
| creator | Kang, Kyung-Suk Chu, Kyung-Jun Chang, Ho-Sik Ihm, Son-Ki |
| description | Ethylene--propylene copolymerization was carried out over MgCl sub 2 -supported TiCl sub 4 catalyst with two different reaction schemes; i.e., stopped-flow copolymerization (SFC) and continuously-purged copolymerization (CPC). The reactivity ratio for each monomer was evaluated by Fineman--Ross and Kelen--Tudos methods. It was found that the SFC resulted in smaller value of ethylene reactivity ratio(r sub E ) and larger value of propylene reactivity ratio(r sub P ) than the CPC. This seems to be attributed to the different extent of interaction between catalytic Ti sites and aluminium alkyls, i.e. active site formation and its over-reduction. Graphs. 13 ref.--AA |
| doi_str_mv | 10.1007/BF00338500 |
| format | Article |
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The reactivity ratio for each monomer was evaluated by Fineman--Ross and Kelen--Tudos methods. It was found that the SFC resulted in smaller value of ethylene reactivity ratio(r sub E ) and larger value of propylene reactivity ratio(r sub P ) than the CPC. This seems to be attributed to the different extent of interaction between catalytic Ti sites and aluminium alkyls, i.e. active site formation and its over-reduction. 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| language | eng |
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| subjects | Applied sciences Copolymerization Exact sciences and technology Organic polymers Physicochemistry of polymers Preparation, kinetics, thermodynamics, mechanism and catalysts |
| title | Copolymerization kinetics obtained by stopped-flow polymerization |
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