Sol-gel-derived inorganic polymers

Structure of Sol—Gel-Derived Inorganic Polymers Silicates and Borates... 

Many of the structural features of sol-gel-derived inorganic polymers are rationalized on the basis of the stability of the M-O-M condensation products in their synthesis environments. Structures which emerge in solution reflect a successive series of hydrolysis, condensation and, depending on the acid or base concentration, restructuring reactions. M-O-M bonds which are unstable with respect to hydrolysis or alcoholysis are generally absent. During... 

The structures of sol-gel-derived inorganic polymers evolve continually as products of successive hydrolysis, condensation and restructuring (reverse of Equations 1-3) reactions. Therefore, to understand structural evolution in detail, we must understand the physical and chemical mechanisms which control the sequence and pattern of these reactions during gelation, drying, and consolidation. Although it is known that gel structure is affected by many factors including catalytic conditions, solvent composition and water to alkoxide ratio (13-141, we will show that many of the observed trends can be explained on the basis of the stability of the M-O-M condensation product in its synthesis environment. 

Farouk, A., Textor, T., Schollmeyer, E., Tarbuk, A., and Grancacic, A. M. (2009). Sol-gel derived inorganic-organic hybrid polymers filled with ZnO nanoparticles as ultraviolet protection finish for textiles, Autex fles./, 9,114-120. 

Tatiana A. Shantalii - Senior researcher, Department of Polymer Thermophysics (DePTh), Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine. She graduated in Organic Chemistry from the Kuban State University (Krasnodar) and got her PhD (Polymer Chemistry) in the Institute of Macro-molecular Chemistry, National Academy of Sciences of Ukraine (1994). Area of research synthesis and structure-property relationships for semi-rigid chain polymers reinforced with the sol-gel derived inorganic nanophase. Publications over 30 papers in refereed journals. 

Xiong M, Zhou S, Wu L, Wang B, Yang L (2004) Sol-gel derived organic-inorganic hybrid from trialkoxysilane-capped acrylic resin and titania effects of preparation conditions on the structure and properties. Polymer 45(24) 8127-8138... 

Brennan A, Wilkes G.L. Stmctnre-property behaviour of sol-gel derived hybrid materials Effect of a polymeric acid catalyst. Polymer 1991 32(N.4) 733-739 Ceram. Trans. 1995 55 291-298 Choi J., Harcup J., Yee A.F., Zhu Q, Laine R. Organic/inorganic hybrid composites from cubic silsesquioxanes. J. Am. Chem. Soc. 2001 123 11420-11430 Coltrain B.K., Sanchez C., Schaefer D.W., Wilkes G.L. (Eds.), Better Ceramics Through Chemistry VII Organic/inorganic Hybrid Materials. Pittsburgh Materials Research Society, 1996... 

H. Schmidt (2(X)0) Sol-gel derived nanoparticles as inorganic phases in polymer-type matrices, Macromol. Symp. 159,43. 

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