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Stabilization of emulsion polymerization by block and graft copolymers with polysiloxane and poly[(acetylimino)ethylene] sequences

✍ Scribed by Simionescu, Cristofor I. ;David, Geta ;Alupei, Valentina ;Rusa, Mariana ;Ioanid, Aurelia ;Simionescu, Bogdan C.


Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
61 KB
Volume
255
Category
Article
ISSN
0003-3146

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✦ Synopsis


Amphiphilic block and graft copolymers with polysiloxane and poly[(acetylimino)ethylene] sequences were used as nonionic surfactants in the emulsion polymerization of some vinyl monomers (styrene, methyl methacrylate, butyl methacrylate). The peculiarities of the systems (polymerization kinetics and emulsion characteristics) were related to the structural features of the studied emulsifiers and suggested their ability to participate in initiation and transfer reactions and respectively clouding phenomena in aqueous phase.

ZUSAMMENFASSUNG: Block-und Pfropfcopolymere mit Polysiloxan-und Poly(acetyliminoethylen)-Bestandteilen wurden als nichtionische Emulgatoren bei der Emulsionspolymerisation von einigen Vinylmonomeren (Styrol, Methylmethacrylat, Butylmethacrylat) benutzt. Die Polymerisationssysteme (kinetische Aussagen, Teilchengro ¨ße, Teilchengro ¨ßenverteilungen, usw.) wurden charakterisiert und die Emulgatorstruktur-Polymerisationseigenschaft-Beziehungen wurden untersucht. Die Teilnahme der Copolymeren an der Initiierungs-und U ¨bertragungsreaktion wurde festgestellt.


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