Authors: I. Portnaya
Affilation: Technion - Israel Institute of Technology, Israel
Pages: 184 - 187
Keywords: latex, freezing, cryostructuration, porous polymer
The presented study concerns with structurization of dispersed phase of polymer latexes during their freezing-thawing. It is known that freezing might have disturbed the latexes aggregate stability. In the presented work it was established that under the fulfillment of a certain conditions the cryo-influence have resulted in the complete coagulation of latex with the formation of unified three-dimensional polymeric structure. We call this phenomenon the ”cryostructuration” of latex, and the formed at these conditions porous three-dimensional polymeric structures – the “cryostructurates”. We have elucidated the principal possibility of latex cryostructuration and studied the morphology of the structures. The morphology depends on the nature of polymer, latex concentration, temperature-time parameters, additives introduced into latex. The principal requirement for the process is the ability of the dispersed polymer particles to autohesion at temperature of storage of the system in frozen state. Cryostructuration of latexes may be considered as a new method of manufacturing the porous polymeric products [1, 2]. References: 1. E.S. Vainerman, I.B. Portnaya, Porous Polymer Material and Process for Production Thereof. US Patent No 5,494,939. 1996. 2. E.S. Vainerman, I.B. Portnaya, Porous Polymer Material and Method of Obtaining It. European Patent EP 0 612 791 B1.1997. Bull. No 1997/14.
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