期刊
MACROMOLECULES
卷 42, 期 18, 页码 6981-6985出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma901293k
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- Pirelli Tyre
- MIUR
Copolymerization of ethylene with 4-methyl-1,3-pentadiene (4-MPD) catalyzed by 1,4-dithabutanediyl-linked bis(phenolato) titanium complexes I and 2 activated by methylaluminoxane (MAO) produced exclusively ethylene-4-MPD copolymers with high activity. The copolymer microstructure can be varied by changing the ratio between the monomers in the copolymerization feed, affording copolymers with 4-MPD content up to 83%. The resulting copolymer are crystalline as shown by thermal analysis and by the X-ray powder diffraction profiles. The microstructural features were fully elucidated by C-13 NMR spectroscopy revealing that the copolymers with various 4-MPD content show a strong tendency to the alternating microstructure which was confirmed by the kinetic elaboration.
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