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Pyrolysis—fluorescence spectroscopy, pyrolysis—mass spectroetry and pyrolysis—liquid chromatography of linear and cross-linked polystyrenes

✍ Scribed by Shih-Tse Lai; David C. Locke

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
616 KB
Volume
314
Category
Article
ISSN
1873-3778

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✦ Synopsis

The pyrolysis of linear and cross-linked polystyrenes is studied using molecular fluorescence spectroscopy, high-performance liquid chromatography (HPLC) with UV absorption and fluorescence emission detectors, and mass spectrometry. In common with many aromatic systems, polystyrene pyrolysis products show molecular fluorescence and also excimer emission. Styrene oligomers up to the dodecamer can be separated isocratically with isooctane eluent on a IO-pm alumina column. Pyrolysis of linear polystyrene in an enclosed system is shown by HPLC to yield primarily monomers; pyrolysis in a continuous-flow system produces monomers but in addition oligomers up to at least the heptamer. Stepwise pyrolysis-mass spectrometry substantiates the HPLC results in more detail, and also provides an indication of head-to-head microstructure in the predominantly head-to-tail polystyrene.

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