Abstract
AbstractPolyolefin coordination catalysts useful for producing UHMWPE are surveyed, including classic Ziegler‐Natta (ZN), current commercial generation ZN, metallocene single site, and non‐metallocene. Catalysts were prepared and compared for productivity and selected polymer properties under a variety of conditions. Classic catalysts used were long lived TiCl3 crystalline metal clusters made by reducing TiCl4 by co‐crystallizing with aluminum alkyls. Data presented from the synthesis and polymerization with these catalysts shows temperature and molecular weight response that were expected for these systems. Commercially available titanium on silica/ magnesium chloride was activated with aluminum alkyls and had higher activity than those of the previous generation. Conditions for polymerizing supported metallocenes for producing polymers in the UHMWPE range were described. Long range “non‐metallocenes” of the phenoxy‐imine class were activated with MAO was tested and reported.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
