Efficient incorporation of a polar comonomer for direct synthesis of hyperbranched polar functional ethylene oligomers. (15th February 2021)

• Record Type: Journal Article
• Authors: Li, Shuaikang; Lu, Zhou; Fan, Weigang; Dai, Shengyu
• Is Part Of: New journal of chemistry. Volume 45:Number 8(2021)
• Page Start: 4024
• Page End: 4031
• Publication Date: 2021-02-15
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj05857b
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Hyperbranched polar functional ethylene oligomers with very high incorporation can be accessible via ethylene–MA co-oligomerization with iminopyridyl Pd(ii ) catalysts. Abstract : A series of iminopyridyl Pd(ii ) catalysts containing bulky diarylmethyl substituents with various remote nonconjugated electron-withdrawing or -donating groups were synthesized and characterized. These catalysts possessing high catalytic activities and long half-life at 50 °C are capable of producing hyperbranched ethylene oligomers in ethylene oligomerization. More importantly, hyperbranched polar functional ethylene oligomers with very high incorporation can be accessible from ethylene–MA co-oligomerization in the presence of iminopyridyl Pd(ii ) catalysts. In terms of catalysts, the remote nonconjugated electronic substituents of bulky diarylmethyl moieties have a significant effect on the molecular weight and branching density of ethylene oligomers/ethylene–MA co-oligomers, as well as the incorporation of MA in ethylene (co)oligomerization.