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Two‐dimensional chromatography applied to the study of the thermo‐oxidative degradation of poly(styrene‐b‐butadiene) star block copolymers
Author(s) -
Moyses Stephan
Publication year - 2012
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200174
Subject(s) - polybutadiene , gel permeation chromatography , copolymer , polystyrene , polymer , styrene , chemistry , degradation (telecommunications) , elution , solvent , gas chromatography , polymer chemistry , chromatography , materials science , organic chemistry , telecommunications , computer science
Two‐dimensional chromatography with gradient polymer elution chromatography in the first dimension and gel permeation chromatography in the second dimension was used to characterize a poly(styrene‐b‐butadiene) star block copolymer. The data evidence several populations that are clues left by the different steps in the sequential reaction employed to make the polymer. The sample was subjected to thermo‐oxidative degradation at 180° C and was analyzed at different times during the process. After a relatively long induction period, the two‐dimensional chromatograms show how the different populations are progressively degraded via random chain scission of the polybutadiene block to leave essentially polystyrene as the only soluble component. With longer thermal aging times, the polystyrene also degrades via chain scission.