Living copolymerization of ethylene with styrene catalyzed by (cyclopentadienyl)(ketimide)titanium(IV) complex - MAO catalyst system: Effect of anionic ancillary donor ligand

Macromolecules

Volumn 39, Issue 16, 2006, Pages 5266-5274

  Zhang, Hao ^a   Nomura, Kotohiro ^a  

^a NARA INSTITUTE OF SCIENCE AND TECHNOLOGY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSTS; CONCENTRATION (PROCESS); COPOLYMERIZATION; LIVING POLYMERIZATION; MICROSTRUCTURE; STYRENE;

DONOR LIGANDS; ETHYLENE PRESSURE; MOLAR RATIOS; SYNDIOTACTIC POLYSTYRENE (SPS);

ETHYLENE;

EID: 33748313472     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma060503a     Document Type: Article

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97. 13
98. 3 from the commercially available MAO (PMAO - S, Tosoh Finechem. Co.), and a certain excess amount of MAO was required for exhibiting high catalytic activity.
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101. n value and polymers yields were not seen. These results might suggest that a certain extent of chain transfer took place for the copolymerization at higher temperature, and the living nature at 55 or 70°C may thus be observed only at the initial stage or under limited conditions.
102. 43
103. 3 did not afford any reduction products and only alkyl exchange was occuring.