Abstract
Incorporation of sulfur in the polymer formed by the emulsion polymerization of styrene with the persulfate initiator was detected many years ago by the use of radiosulfur S35 (1) (2). Work on other polymers indicated however that this was not always the case (3). In these experiments, initiator residues could be trapped within the polymer chains, also no indication is obtained about the ionic state of the sulfur element. Dye-partition methods used for end-groups determinations give a very low amount of chemically bound sulfate per polymer molecule (4). Side reactions of sulfate radicals leading to hydroxyl radicals (5) (6) may also be involved and operative in the initiation and termination processes. These previous results on the bulk polymer do not provide any information about the effective presence of sulfate groups on the latex particles. The investigation of polystyrene latexes with an analytical tool having a specificity to surface sulfate groups was therefore considered necessary.
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Stone, W.E.E., Stone-Masui, J.H. (1983). XPS Study of Sulfate Groups on Polystyrene Latexes. In: Poehlein, G.W., Ottewill, R.H., Goodwin, J.W. (eds) Science and Technology of Polymer Colloids. NATO ASI Series, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-4795-0_11
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DOI: https://doi.org/10.1007/978-94-017-4795-0_11
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