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Time‐resolved optical absorption spectroscopy of molten polyethylene blends
Author(s) -
Brede Ortwin,
Hermann Ralf,
Helmstreit Wilfried,
Taplick Thomas,
Stephen Ludwig
Publication year - 1988
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19880180110
Subject(s) - diphenylamine , benzophenone , photochemistry , radical , spectroscopy , absorption spectroscopy , ultrafast laser spectroscopy , dissociation (chemistry) , chemistry , absorption (acoustics) , flash photolysis , radiolysis , materials science , kinetics , analytical chemistry (journal) , organic chemistry , optics , reaction rate constant , physics , quantum mechanics , composite material
By means of pulse radiolysis and laser photolysis experiments with detection by optical absorption spectroscopy short‐living radical transients in pure PE and in PE doped with additives (e.g. di‐>tert‐butyl‐p‐cresol, diphenylamine, benzophenone and carbon tetrachloride) were characterized by their optical absorption spectra and kinetics. It was found that the additive radicals were formed in a very fast process probably via exciton migration and subsequent energy transfer and dissociation reactions.