Organo-inorganic matrices

Parshakov A. S. with coauthors [25] have offered a new method of synthesis organo-inorganic composites nanoclusters transitive metals in an organic matrix by reactions of compounds of transitive metals of the maximum degrees of oxidation with monomers that at the first stage represent itself as a reducer. Formed thus clusters metals of the lowest degrees of oxidation are used for catalysis of polymerization a monomer with formation of an organic matrix. 

One potential solution to these problems, suggested some 20 years ago by Chantrell and Popper (1), involves the use of inorganic or organo-metallic polymers as precursors to the desired ceramic material. The concept (2) centers on the use of a tractable (soluble, meltable or malleable) inorganic precursor polymer that can be shaped at low temperature (as one shapes organic polymers) into a coating, a fiber or as a matrix (binder) for a ceramic powder. Once the final shape is obtained, the precursor polymer can be pyrolytically transformed into the desired ceramic material. With careful control of the pyrolysis conditions, the final piece will have the appropriate physical and/or electronic properties. 

Many other household products can be analysed in similar ways to those described above for chemicals. Household bleach is essentially an inorganic chemical. There has been concern expressed about mercury levels in hypochlorite bleach because of the way it is manufactured. The cold vapour reduction/aeration method referred to above is a good way of determining low mercury levels with minimal matrix problems [82]. In the past organo-mercurial compounds have been used (e.g. as bactericides) in some household products these may be selectively determined by extraction with an organic solvent (e.g. carbon tetrachloride or benzene), and then application of the cold-vapour method following the addition of cysteine acetate, or by coupled gas chromatography/atomic absorption [83],... 

Figure 9.4 shows how the methanol permeability decreases when the inorganic phase, independent of form or aspect, is treated with organo-modified silanes. In the samples of Fig. 9.4, the fillers were modified with silanes containing basic groups such as amine or imidazole. The main function of the basic snrface is to improve the compatibilization to the acid polymer matrix and inhibit the formation of cavities or defects between filler and matrix, which wonld otherwise act as a path... 

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