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Heterophase polymerization of styrene in the presence of organosilicon compounds of various natures |
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| Authors: | I A Gritskova V S Papkov I G Krasheninnikova A M Evtushenko |
| Institution: | (1) Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 119571, Russia;(2) Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow, 119991, Russia;(3) Moscow State University of Technology and Management, ul. Zemlyanoi Val 73, Moscow, 109004, Russia |
| Abstract: | The heterophase polymerization of styrene has been carried out in the presence of surfactants—organosilicon compounds with different solubilities in aqueous and styrene phases and surface activities at the interface. It has been demonstrated that the stability of polymer suspensions prepared with water-insoluble organosilicon compounds is much higher than that in the presence of organosilicon surfactants soluble in organic and aqueous phases. In the former case, suspensions with narrower particle-size distributions are produced. The stability of polymer microspheres prepared at various monomer-to-water volume ratios has been tested. An increase in the monomer concentration above 25 vol % leads to the loss of system stability. |
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