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John E. Bercaw (born December 3, 1944) is an American chemist and Centennial Professor of Chemistry at the California Institute of Technology. 〔http://www.cce.caltech.edu/faculty/bercaw/〕〔http://directory.caltech.edu/cgi-bin/search.cgi?searchtext=bercaw〕 Born in Cincinnati, Ohio, Bercaw obtained his Ph.D. from the University of Michigan in 1971 under the direction of Hans-Herbert Brintzinger, followed by postdoctoral research with Jack Halpern at the University of Chicago. 〔http://www.chemistry.illinois.edu/events/lectures/bailar/John_Bercaw.html〕 He joined the faculty at the Caltech in 1972. Bercaw was elected a Fellow of the American Academy of Arts and Sciences in 1991.〔(【引用サイトリンク】url=http://www.amacad.org/publications/BookofMembers/ChapterB.pdf )〕 He is a member of the National Academy of Sciences (elected 1990), and he has received several national awards from the American Chemical Society (see below). 〔http://www2.chemistry.msu.edu/Lectureships/lectures.asp?series=MTR&Year=1993〕 His research interests are in synthetic, structural and mechanistic organotransition metal chemistry, including most recently catalysts for polymerization and trimerization of olefins and investigations of hydrocarbon hydroxylation; fundamental transformations and thermodynamics of organotransition metal chemistry; catalysts for hydrocarbon partial oxidation; catalysts for olefin trimerization and polymerization; homogeneous transformations of carbon monoxide and dihydrogen to fuels and chemicals. Prof. Bercaw has greatly enhanced our understanding of the mechanisms of Ziegler-Natta (ZN) olefin polymerizations. This metal-catalyzed polymerization process is operated on a vast scale and produces, worldwide, over 200 billion pounds of polyolefins per year. Bercaw’s work has led to a fundamental understanding of the detailed mechanisms of chain growth in ZN polymerizations and the factors which control syndio- and isotacticities and the degree of comonomer incorporation in copolymerizations; these variables are critical in determining the physical properties of the resultant polymers and copolymers. Commercial processes have been based on Bercaw’s discoveries. For example, new and superior ethylene/alpha-olefin copolymers are now industrially produced with titanium catalysts utilizing (η5- C5Me4)SiMe2NCMe3 and related ligands devised in Bercaw’s laboratories. These copolymers have proved to have superior properties. These types of systems have also allowed superior methods for production of ethylene/propylene and ethylene/propylene/diene elastomers. ==Awards== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「John E. Bercaw」の詳細全文を読む スポンサード リンク
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