D
Donna J. Crowther
Researcher at ExxonMobil
Publications - 86
Citations - 1517
Donna J. Crowther is an academic researcher from ExxonMobil. The author has contributed to research in topics: Polymerization & Copolymer. The author has an hindex of 20, co-authored 86 publications receiving 1503 citations.
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Patent
High temperature olefin polymerization process
TL;DR: In this article, a bridged hafnocene catalyst complex was proposed for olefin polymerization processes using highly substituted noncoordinating anions that are surprisingly stable under high temperature OE processes.
Patent
Mixed catalysts and their use in a polymerization process
Ching-Tai Lue,Donna J. Crowther +1 more
TL;DR: In this paper, a mixed catalyst system of at least one bridged, asymmetrically substituted, bulky ligand metallocene-type compound and at least 1 bridged asymmetric, asymmetric substituted, heavy metal metallocenes was described.
Patent
A polymerization process for producing easier processing polymers
TL;DR: In this paper, a cyclic bridged metallocene-type catalyst system was used to polymerize olefin(s) utilizing a cyclically bridged metal-oxide type catalyst system.
Patent
High vinyl terminated propylene based oligomers
TL;DR: In this article, a co-oligomer with an Mn of 300 to 30,000 g/mol comprising 10 to 90 mol % propylene and 10-to-90 mol % of ethylene was proposed, where the oligomer has at least X % allyl chain ends.
Journal ArticleDOI
Stereoregular, alternating ethylene-norbornene copolymers from monocyclopentadienyl catalysts activated with non-coordinating discrete anions
TL;DR: In this paper, the authors report two group 4 monocyclopentadienyl catalyst systems that yield semicrystalline ethylene/norbornene copolymers with glass transition temperatures over 110°C and melt temperatures over 240°C.