Polymerization with TMA-protected polar vinyl comonomers. II. Catalyzed by nickel complexes containing α-diimine-type ligands

✍ Scribed by Sandra G. Correia; Maria M. Marques; José R. Ascenso; Alejandro F. G. Ribeiro; Pedro T. Gomes; Alberto R. Dias; Mathew Blais; Marvin D. Rausch; James C. W. Chien

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 160 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990715)37:14<2471::aid-pola21>3.0.co;2-a

✦ Synopsis

␣-Diimine Ni complexes (7, 8) were used as catalyst precursors with MAO in co-and terpolymerization of ethylene/propylene/␣-olefins with OH and COOH functional groups. Trimethylaluminium was used to protect the functional group of polar monomers. The presence of 5-hexen-1-ol seems to have no effect on the polymerization rate at all for the N, NЈ-bis(2,6-diisopropylphenyl) derivative 8 but caused activity decreases of about fivefold in copolymerization and around two times in terpolymerization for the N,N-dimesityl derivative 7. The effect levels off at higher polar comonomer concentration. This system, (7)/MAO, also incorporates well both 10-undecen-1-ol and 10-undecen-1-oic acid. The activities obtained with these ␣-diimine Ni complexes in co-and terpolymerization are three to twenty times higher than those obtained with group 4 Cp based complexes especially at concentrations of polar monomer in the feed higher than 80 mM.