Lawrence Paul Demejo
Eastman Kodak Company
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Featured researches published by Lawrence Paul Demejo.
Hard Copy and Printing Materials, Media, and Processes | 1990
Lawrence Paul Demejo; Dennis J. Massa; Jeffrey A. Wesson; John C. Wilson
A series of branched polyester toners was synthesized by design to exhibit a systematic variation in the level of tetrafunctional branching agent and a nearly matched melt viscosity. The branching agent level was varied in five steps from 0 to 5 mole percent of total diol component in the fmal polymer. The various compositions were polymerized by a one-step toner synthetic process to avoid the molecular weight degradation normally associated with the melt compounding step. These materials were then ground to toners that exhibited a broad range of performance characteristics. The toner hot offset temperature was found to be nearly independent of branch agent concentration, while the image glossing characteristics of these materials were found to vary over a broad frequency (or equivalent temperature) range. These results suggest that the hot offset temperature is mainly a function of the melt viscosity of toners with similar chemical and rheological characteristics and the glossing response is determined primarily by their elastic properties above Tg. The change in glossing timescale tracked quantitatively the change in the terminal zone elastic modulus for these and analogous branched polyester toners.
Archive | 1996
Jiann-Hsing Chen; Lawrence Paul Demejo; Gary Frederick Roberts; Richard John Kosakowski; Muhammed Aslam; John Euguene Derimiggio
Archive | 1986
Steven M. Bonser; Douglas Eugene Bugner; Lawrence Paul Demejo
Archive | 1990
John C. Wilson; Lawrence Paul Demejo
Archive | 1987
Douglas Eugene Bugner; Peter S. Alexandrovich; Lawrence Paul Demejo; Robert A. Guistina; James H. Anderson
Archive | 1990
Lawrence Paul Demejo; John M. McCabe; John C. Wilson
Archive | 1993
Jiann H. Chen; Tsang J. Chen; Lawrence Paul Demejo; Gary Frederick Roberts
Archive | 1987
Douglas Eugene Bugner; Peter S. Alexandrovich; Lawrence Paul Demejo; Robert A. Guistina; James H. Anderson
Archive | 1994
Tsang J. Chen; Jiann-Hsing Chen; Ming-Shih Lian; Lawrence Paul Demejo; Gary Frederick Roberts
Archive | 1984
John C. Wilson; Lawrence Paul Demejo; Thomas A. Jadwin; Stewart H. Merrill