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Cover Picture (Angew. Chem. Int. Ed. Engl. 6/1991)
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199106131
Subject(s) - cover (algebra) , polymerization , bar (unit) , polymer science , physics , chemistry , materials science , engineering , nuclear magnetic resonance , meteorology , mechanical engineering , polymer
The Cover picture shows schematically the possibility of characterizing reactions at high pressure (flange) and high temperatures (red heat) spectroscopically. In the center of the picture are a series NIR spectra which were recorded during the polymerization of ethylene (E) to polyethylene (PE) at 463 K and 2630 bar. In this way the percentage conversion of the polymerization can be monitored directly. More about quantitative absorption spectroscopy in the IR and UV regions at pressures up to 7 kbr and temperatures up to 900 K is reported by M. Buback on p. 641.