Copolymerization of ethylene with 5-vinyl-2-norbornene in the presence of the Ph2C(Flu)(Cp)ZrCl2 /MAO catalyst

Facile, Efficient Copolymerization of Ethylene with Norbornene-Containing Dienes Promoted by Single Site Non-Metallocene Oxovanadium(V) Catalytic System

“…to vanadium complexes) was employed as reactivating agent; a VNB incorporations were (mol %) calculated from 1 H NMR spectra; b Weight-average molecular weight (Mw) and polydispersity indexes (PDI) of the copolymers were determined by high temperature The incorporations and stereoselectivity of VNB were unambiguously revealed by 1 H, 13 C, and DEPT NMR spectra. All resonances were clearly identified and the data agreed well with the previously reported values [15,16]. No signals around 6.1 ppm relative to the C=C double bond of norbornene presented, while the resonances between 4.8 and 6.0 ppm corresponding to the pendant vinyl groups could be observed in the l H NMR spectra of the copolymers.…”

Homo- and copolymerization of 5-ethylidene-2-norbornene with ethylene by [2-C5Me4-4,6-tBu2C6H2O]TiCl2/AliBu3/Ph3CB(C6F5)4 catalyst system and epoxidation of the resulting copolymer

“…On the other hand, one of the most attractive subjects in this field is the introduction of polar functional groups in the polyolefin molecules [13,14]. This is primarily because polar functionality in polyolefins substantially improves the polymer properties such as permeability, dye ability, adhesion, and compatibility with other materials [15][16][17][18]. However, the remarkable drawback of group 4 metallocene catalysts is their limited ability to polymerize polar monomers [15].…”

“…This is primarily because polar functionality in polyolefins substantially improves the polymer properties such as permeability, dye ability, adhesion, and compatibility with other materials [15][16][17][18]. However, the remarkable drawback of group 4 metallocene catalysts is their limited ability to polymerize polar monomers [15]. Thus, much work has recently been focused on the chemical modification of polymers containing reactive groups, like vinyl or vinylidene group, etc.…”

Synthesis and properties of polyethylene and polypropylene containing hydroxylated cyclic units in the main chain

“…Copolymerizations of ethylene and various cyclodiolefins, such as vinycyclohexene, cyclopentadiene, 1,5-cyclooctadiene, 2,5-norbornadiene, 5-vinyl-2-norbornene (VNB), dicyclopentadiene (DCPD), have been investigated with various metallocene catalysts. These copolymerizations produced the corresponding copolymers having unsaturated cyclic units in the polyethylene main chain [1][2][3][4][5][6][7][8]. The unsaturated group was efficiently converted to hydroxyl group or epoxy group with following chemical reactions [1][2][3].…”