(Micro)structure, thermal behavior and mechanical properties of ethylene–propylene–1-octadecene terpolymers from chain-walking polymerization of 1-octadecene

Copolymerization of ethylene with propylene and higher α-olefins catalyzed by (imido)vanadium(iv) dichloride complexes

“…the non-uniformity in the comonomer distribution due to inter-and intramolecular compositional heterogeneity. 80,81 The copolymer thermal stability was investigated by TGA under inert atmosphere. In Figure 12 thermograms for samples obtained by 2a are reported as an example.…”

Synthesis of polyethylene thermoplastic elastomer by using robust α‐diimine Ni(II) catalysts with abundant tBu substituents

“…[1][2][3] Over the past two decades, the development of late transition metal α-diimine catalysts for the preparation of high-level polyolefins have attracted much attention since the seminal work revealed by Brookhart et al [4][5][6][7] As the milestone discovery, α-diimine Ni(II) catalysts mediated insertion polymerization is able to generate various branched PEs via an innovative chain walking mechanism. [8][9][10][11][12][13][14][15][16][17][18][19][20][21] As steric and electronic effects of ligand play crucial roles in these polymerizations, numerous efforts have been made to modify the α-diimine ligand sterics and electronics for improving thermal stability of catalysts, catalytic activities, molecular weight and topology of polymers, incorporation and scope of polar functional groups. [22][23][24][25][26][27][28][29][30][31][32] Among them, α-diimine Ni(II) catalysts bearing sterically very demanding 2,6-diarylmethyl substituent on the N-aryl group have gained special attentions.…”

“…Polyolefins, such as polyethylene (PE) and polypropylene (PP), are the most abundant plastic worldwide with a wide range of applications 1–3 . Over the past two decades, the development of late transition metal α‐diimine catalysts for the preparation of high‐level polyolefins have attracted much attention since the seminal work revealed by Brookhart et al 4–7 As the milestone discovery, α‐diimine Ni(II) catalysts mediated insertion polymerization is able to generate various branched PEs via an innovative chain walking mechanism 8–21 . As steric and electronic effects of ligand play crucial roles in these polymerizations, numerous efforts have been made to modify the α‐diimine ligand sterics and electronics for improving thermal stability of catalysts, catalytic activities, molecular weight and topology of polymers, incorporation and scope of polar functional groups 22–32 .…”

Living Chain-Walking (Co)Polymerization of Propylene and 1-Decene by Nickel α-Diimine Catalysts

“…In the field of polyolefin research [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], many studies have reported on the homopolymerization of ethylene [ 21 , 22 , 23 , 24 ], different higher 1-alkene [ 25 , 26 , 27 , 28 , 29 , 30 , 31 ], and linear internal alkenes [ 32 , 33 , 34 ] using Brookhart-type α-diimine nickel and palladium catalysts [ 35 , 36 , 37 , 38 , 39 , 40 , 41 ] because of the chain-walking process [ 42 , 43 , 44 , 45 ]. The interest in highly branched polyolefins such as dendrimer and hyper branched polymers has increased obviously in recent years owing to these unique physical properties, chemical properties, and their potential applications as adhesives, lubricants, and paints [ 7 ].…”