Degradation and stabilization of styrene-ethylene-butadiene-styrene (SEBS) block copolymer

Norman S. Allen, Michele Edge, Arthur Wilkinson, Cristopher M. Liauw, Despina Mourelatou, Juan Barrio, Maria A. Martínez-Zaporta

    Research output: Contribution to journalArticlepeer-review


    The degradation of hydrogenated poly[styrene-b-butadiene-b-styrene] or poly[styrene-b-(ethylene-co-butylene)-b-styrene] (SEBS) was studied. High temperature oxidation of non-commercial unstabilized material results in chain scission and severe crosslinking giving rise to extensive discoloration. The luminescence also shows a rapid initial disruption of the polystyrene excimers coupled with the formation of long wavelength emitting polyconjugated chromophores, possibly stilbene type in nature. Color is evident in both crosslinked and uncrosslinked phases. Phosphorescence analysis also indicated the presence of initial acetophenone chromophores, which are associated with polystyrene end groups formed by chain breakage at the aliphatic links.
    Original languageEnglish
    Pages (from-to)113-122
    Number of pages9
    JournalPolymer Degradation and Stability
    Issue number1
    Publication statusPublished - 2000


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