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dc.contributor.authorVan der Merwe, Marina M.
dc.contributor.authorJordaan, Johannes H.L.
dc.contributor.authorOtto, Daniel P.
dc.contributor.authorLandman, Marilé
dc.contributor.authorVan Rooyen, Petrus H.
dc.date.accessioned2017-03-23T11:13:40Z
dc.date.available2017-03-23T11:13:40Z
dc.date.issued2017
dc.identifier.citationVan der Merwe, M.M. et al. 2017. Structural assignment of commercial polyisobutylene succinic anhydride-based surfactants. Journal of surfactants and detergents, 20(1): 193-205. [https://doi.org/10.1007/s11743-016-1893-9]en_US
dc.identifier.issn1097-3958
dc.identifier.issn1558-9293 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/20913
dc.identifier.urihttps://doi.org/10.1007/s11743-016-1893-9
dc.identifier.urihttps://link.springer.com/article/10.1007%2Fs11743-016-1893-9
dc.description.abstractConcentration of the surface active agents in industrial products is a common source of error. In order to compare the efficiency of a number of polyisobutylene succinic anhydride (PIBSA) based surfactants, their concentration needs to be determined with a fair degree of accuracy. Industrial samples of the monoethanolamine adduct of PIBSA (PIBSA-MEA) concentrate were used for chromatographic separation of the functionalized surfactant from the sample matrix. Complete spectroscopic assignments were based on detailed analysis of all the precursors and of the purified mixture of structural isomers. The structures of the double bond isomers were consistent with the expected addition products of the classic Alder-ene reaction-derived PIBSA. The carbon–carbon connectivity of the succinamide head group to the bulky polymer tail of PIBSA-MEA was more complicated than previously thought, pointing towards regioselectivity in the nucleophilic substitution of PIBSA. By analogy, further structural assignments of two other surfactants, branded as PIBSA-IMIDE and PIBSA-UREA were made from the spectroscopic data recorded on crude industrial samples. Detailed nuclear magnetic resonance (NMR) assignments for all three surfactants reported here were utilized to develop a semi-quantitative 13C-NMR based method for the estimation of the amount of the functionalized surfactant relative to the total PIB content in the industrial concentrates. The results highlight common sources of structure- and concentration-dependent errors in high internal phase emulsion formulationsen_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.subjectPIBSAen_US
dc.subjectEthanolamineen_US
dc.subjectUreaen_US
dc.subjectSuccinamideen_US
dc.subjectSurfactanten_US
dc.subjectNMRen_US
dc.subjectFTIRen_US
dc.subjectESI-MSen_US
dc.subjectGPCen_US
dc.titleStructural assignment of commercial polyisobutylene succinic anhydride-based surfactantsen_US
dc.typeArticleen_US
dc.contributor.researchID10792341 - Jordaan, Johannes Hendrik Lodewikus
dc.contributor.researchID11333561 - Otto, Daniel Petrus


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