Syndiospecific polymerization of styrene with half-titanocene catalysts containing fluorinated phenoxy ligands
Year: 2025
Type: article
Abstract: Novel half-titanocene catalysts containing fluorinated phenoxy ligands were synthesized and used for the syndiotactic polymerization of styrene in the presence of low methylaluminoxane (MAO) and triisobutylaluminum (TIBA) as cocatalysts. The influences of polymerization conditions, including temperature and Al/Ti ratio, on polymerization behaviour and the molecular weight of the resultant polymer were studied. The fluorinated half-titanocene catalysts displayed higher catalytic activity and produced syndiotactic polystyrene (sPS) with a higher molecular weight as a result of the electron-withdrawing conjugation effect of fluorinated phenoxy ligands. This effect stabilizes Ti(iii) active centers and/or enhances propagation while reducing the chain transfer rate constant.
Source: RSC Advances
DOI: 10.1039/d5ra00389j
Authors: Bin Wu, Qingyu Zhang, Hongyu Liu, Tongtong Zhang, Xiaolong Yang, Fangming Zhu
Institution: Sun Yat-sen University
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,042
OpenAlex ID: W4409209264