Abstract
The emulsion polymerization of vinyl acetate(VAc) in the presence and absence of poly(vinyl alcohol)(PVA) as emulsifier was carried out using a dilatometer. Both the potassium persulfate(KPS)–l-ascorbic acid(AsA) system and the hydrogen peroxide(HPO)–AsA system were used as initiators. The polymerization initiated by the KPS–AsA system proceeded smoothly even without PVA, and the polymer latex obtained was extremely stable. On the other hand, when the HPO–AsA system was used as the initiator of polymerization, because the polymer particles produced in the absence of PVA settle out as a precipitate, a stable polymer latex was not formed without using PVA. The maximum rate of polymerization initiated at 20°C by the KPS–AsA system was independent of the PVA concentration, but that initiated at 20°C by the HPO–AsA system was proportional to 0.22 power of the PVA concentration. On the basis of these results, the effects of types of various initiators on the emulsion polymerization of VAc were discussed.
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Hayashi, S., Iwase, K. & Hojo, N. Emulsion Polymerization of Vinyl Acetate in the Presence of Poly(vinyl alcohol) as Emulsifier. Polym J 3, 226–233 (1972). https://doi.org/10.1295/polymj.3.226
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DOI: https://doi.org/10.1295/polymj.3.226