Polyolefin–Polar Block Copolymers from Versatile New Macromonomers
| Autor: | Tony McNally, Carl Waterson, Christopher Kay, Colin Morton, Peter Scott, Shaun Morris, Kenneth Lewtas, Connah A. Burnett, Peter M. Wright, Paul D. Goring, Ben Hornby, Giles W. Theaker |
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| Rok vydání: | 2018 |
| Předmět: |
TP
Acrylate 010405 organic chemistry Hydride General Chemistry 010402 general chemistry Macromonomer 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Polyolefin chemistry.chemical_compound End-group Colloid and Surface Chemistry Monomer chemistry Polymerization Polymer chemistry Copolymer |
| Zdroj: | Journal of the American Chemical Society. 140:13921-13934 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.8b09039 |
| Popis: | A new metallocene-based polymerization mechanism is elucidated in which a zirconium hydride center inserts α-methylstyrene at the start of a polymer chain. The hydride is then regenerated by hydrogenation to release a polyolefin containing a single terminal α-methylstyrenyl group. Through the use of the difunctional monomer 1,3-diisopropenylbenzene, this catalytic hydride insertion polymerization is applied to the production of linear polyethylene and ethylene-hexene copolymers containing an isopropenylbenzene end group. Conducting simple radical polymerizations in the presence of this new type of macromonomer leads to diblock copolymers containing a polyolefin attached to an acrylate, methacrylate, vinyl ester, or styrenic segments. The new materials are readily available and exhibit interfacial phenomena, including the mediation of the mixing of immiscible polymer blends. |
| Databáze: | OpenAIRE |
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