- Email: [email protected]
Polymer processing sensor
IV
trends in analytical chemistry, vol. 14, no. 1, 7995
in the news Golay award 1994 During the opening session of the 16th International Symposia on Capillary Chromatography in Riva de1 Garda, September 27th, the Golay medal, sponsored by Perkin Elmer, was presented to Professor J.W. Jorgenson, Department of Chemistry, University of North Carolina. He was elected by the Golay Award Committee for his outstanding work in the field of microseparations. On behalf of Perkin Elmer, Dr. J. Hinshaw presented the medal. Jim Jorgenson was born in 1952 in Kenosha, Wisconsin, USA. He obtained his BS in Chemistry in 1974 at the Northern Illinois University and his PhD in Chemistry, with Professor Novotny, at Indiana University in 1979. His thesis had the interesting title: “Investigation of the nature of chemical messengers in mammalian communications”. A large number of
his publications relate to scents and
pheromones (of the American red fox, notably) and other bioanalytical applications. He is a specialist in the field of micro-analytical separations: sample introduction systems, column technology, micro-column liquid chromatography. The major impact of Jorgenson’s work, however, has been in the area of capilelectrophoresis. His lary pioneering publication in 1981 (Journal of Chromatography and Analytical Chemistry) have created entirely new directions in the rapidly growing field of electromigration methods. He in fact largely responsible for the tremendous current interest in capillary electrophoresis. At a recent symposium organized by the Ohio Valley Chromatography Group one of the plenary lectures on electrophoresis even divided the field of electrophoresis in a period before and after Jorgenson! Commercial instruments for CE, now widely available, are strongly reminiscent of the equipment described by him in 1981.
Polymer processing sensor NIST scientists have been awarded a patent for the development of an Dptical sensor that can be used to 1monitor the solidification of polymer resins during processing by injection molding. Its operation is based on monitoring fluorescing light from a dye that has been (loped into the resin at a very low (:oncentration. The sensor consists (If an optical fiber that is inserted into the mold and transmits the flu(jrescing light to detection c:quipment. During injection molding, the polymer is heated to the Inolten state whereupon it is in_iected into a mold that determines its final dimensions. As the polymer C:ools, it solidifies by crystallization )r glass formation. The time of so; idification is important because it ignals the time when the part can Eje ejected from the mold and fresh r nolten resin can be injected. The ttethnology allows processors to Cobtain a light intensity versus time characterizes resin I:brofile that Cooling and solidification. t
i
;
E;or information,
contactAnthony J. B210 Polymer Bldg., NIST, MD 20899-0001, c Taithersburg 301) 975-6748.
J!lul;
Views and opinions expressed in this section do not necessarily reflect those of the Publisher or the Editors. No responsibility is assumed by the Publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein.
trends in analytical chemistry, vol. 14, no. 1, 7995
in the news Golay award 1994 During the opening session of the 16th International Symposia on Capillary Chromatography in Riva de1 Garda, September 27th, the Golay medal, sponsored by Perkin Elmer, was presented to Professor J.W. Jorgenson, Department of Chemistry, University of North Carolina. He was elected by the Golay Award Committee for his outstanding work in the field of microseparations. On behalf of Perkin Elmer, Dr. J. Hinshaw presented the medal. Jim Jorgenson was born in 1952 in Kenosha, Wisconsin, USA. He obtained his BS in Chemistry in 1974 at the Northern Illinois University and his PhD in Chemistry, with Professor Novotny, at Indiana University in 1979. His thesis had the interesting title: “Investigation of the nature of chemical messengers in mammalian communications”. A large number of
his publications relate to scents and
pheromones (of the American red fox, notably) and other bioanalytical applications. He is a specialist in the field of micro-analytical separations: sample introduction systems, column technology, micro-column liquid chromatography. The major impact of Jorgenson’s work, however, has been in the area of capilelectrophoresis. His lary pioneering publication in 1981 (Journal of Chromatography and Analytical Chemistry) have created entirely new directions in the rapidly growing field of electromigration methods. He in fact largely responsible for the tremendous current interest in capillary electrophoresis. At a recent symposium organized by the Ohio Valley Chromatography Group one of the plenary lectures on electrophoresis even divided the field of electrophoresis in a period before and after Jorgenson! Commercial instruments for CE, now widely available, are strongly reminiscent of the equipment described by him in 1981.
Polymer processing sensor NIST scientists have been awarded a patent for the development of an Dptical sensor that can be used to 1monitor the solidification of polymer resins during processing by injection molding. Its operation is based on monitoring fluorescing light from a dye that has been (loped into the resin at a very low (:oncentration. The sensor consists (If an optical fiber that is inserted into the mold and transmits the flu(jrescing light to detection c:quipment. During injection molding, the polymer is heated to the Inolten state whereupon it is in_iected into a mold that determines its final dimensions. As the polymer C:ools, it solidifies by crystallization )r glass formation. The time of so; idification is important because it ignals the time when the part can Eje ejected from the mold and fresh r nolten resin can be injected. The ttethnology allows processors to Cobtain a light intensity versus time characterizes resin I:brofile that Cooling and solidification. t
i
;
E;or information,
contactAnthony J. B210 Polymer Bldg., NIST, MD 20899-0001, c Taithersburg 301) 975-6748.
J!lul;
Views and opinions expressed in this section do not necessarily reflect those of the Publisher or the Editors. No responsibility is assumed by the Publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein.