Iodoform-mediated free radical emulsion polymerization of chloroprene

The free radical emulsion polymerization of chloroprene (CP) is carried out at 9°C using different amounts of iodoform as the chain transfer agent. The molecular weight of polychloroprene (PCP) can be regulated effectively by CHI3. PCP suitable for use as an adhesive is obtained with 0.22–0.28 wt %...

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Veröffentlicht in:	Journal of applied polymer science 2013-05, Vol.128 (4), p.2291-2296
Hauptverfasser:	Gu, Juming, Yan, Xinhua, Fu, Zhifeng, Yang, Wantai, Shi, Yan
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Chain transfer chain transfer agent Conversion Emulsion polymerization Exact sciences and technology Free radicals living polymerization Materials science Mercaptans Molecular weight Monomers Organic polymers Physicochemistry of polymers polychloroprene Polymerization Polymers Preparation, kinetics, thermodynamics, mechanism and catalysts radical polymerization
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Zusammenfassung:	The free radical emulsion polymerization of chloroprene (CP) is carried out at 9°C using different amounts of iodoform as the chain transfer agent. The molecular weight of polychloroprene (PCP) can be regulated effectively by CHI3. PCP suitable for use as an adhesive is obtained with 0.22–0.28 wt % CHI3 and reaches even higher monomer conversion than when mercaptan is used as the chain transfer agent. The emulsion polymerization of CP with high amounts of CHI3 (1.0–3.0 wt %) proceeds in a living polymerization manner. The molecular weight increases in proportion to the monomer conversion in the range of the whole polymerization process even up to very high monomer conversion. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
ISSN:	0021-8995 1097-4628
DOI:	10.1002/app.38082