In 2022,Ch. Gagieva, Svetlana; Kurmaev, Dmitrii A.; Tuskaev, Vladislav A.; Khrustalev, Viktor N.; Churakov, Andrei V.; Golubev, Evgenii K.; Sizov, Alexander I.; Zvukova, Tamara M.; Buzin, Mikhail I.; Nikiforova, Galina G.; Evseeva, Maria D.; Bulychev, Boris M. published an article in European Polymer Journal. The title of the article was 《First example of cationic titanium (III) complexes with crown ether as catalysts for ethylene polymerization》.Recommanded Product: 33100-27-5 The author mentioned the following in the article:
Complex cations with a vacant coordination site are considered as the most plausible catalytically active centers of metallocene and post-metallocene polymerization catalysts. For the first time we demonstrated that cationic titanium (III) complexes stabilized with crown ether can be used as pre-catalysts for ethylene polymerization In the presence of alkyl aluminum chlorides and MgBu2 as cocatalysts, these complexes catalyze ethylene polymerization to produce Ultra High Mol. Weight Polyethylene (UHMWPE) with productivity up to 4650 kgPE/molTi h·atm and mol. weight up to 1.8·106 Da. UHMWPE powders were processed by the solid-phase method with subsequent orientation drawing into high-strength (1.4-2.1 GPa) and high-modulus (91-118 GPa) films. In the part of experimental materials, we found many familiar compounds, such as 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Recommanded Product: 33100-27-5)
1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Recommanded Product: 33100-27-5
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem