Open AccessEffect of para ‐Substituents in Ethylene Copolymerizations with 1‐Decene, 1‐Dodecene, and with 2‐Methyl‐1‐Pentene Using Phenoxide Modified Half‐Titanocenes‐MAO Catalyst Systems
Author(s) -
Kitphaitun Suphitchaya,
Yan Qing,
Nomura Kotohiro
Publication year - 2021
Publication title -
chemistryopen
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 29
ISSN - 2191-1363
DOI - 10.1002/open.202100047
Subject(s) - comonomer , chemistry , substituent , copolymer , ethylene , catalysis , medicinal chemistry , polymerization , polymer chemistry , polymer , photochemistry , organic chemistry
Effect of para ‐substituents in the ethylene (E) copolymerization with 1‐decene (DC), 1‐dodecene (DD), and with 2‐methyl‐1‐pentene (2M1P) using a series of Cp*TiCl 2 (O‐2,6‐ i Pr 2 ‐4‐R‐C 6 H 2 ) [R=H ( 1 ), t Bu ( 2 ), Ph ( 3 ), CHPh 2 ( 4 ), CPh 3 ( 5 ), SiMe 3 ( 6 ), SiEt 3 ( 7 ), and newly prepared 4‐ t BuC 6 H 4 ( 8 ) and 3,5‐Me 2 C 6 H 3 ( 9 )]‐MAO catalyst systems has been studied. The activities in these copolymerization reactions were affected by the para ‐substituent, and the SiMe 3 ( 6 ), SiEt 3 ( 7 ) and 3,5‐Me 2 C 6 H 3 ( 9 ) analogues showed the higher activities at 50 °C in the E copolymerization reactions with DC (1.06–1.44×10 6 kg‐polymer/mol‐Ti⋅h), DD (1.04–1.88×10 6 kg‐polymer/mol‐Ti⋅h) than the others, whereas no significant differences were observed in the comonomer incorporations. Complexes 6 and 7 also showed the higher activities at 50 °C in the E/2M1P copolymerization, and the 2M1P incorporation was affected by the para ‐substituent and the polymerization temperature; complex 9 showed better 2M1P incorporation at 25 °C.