FIELD: organic chemistry, polymers.
SUBSTANCE: invention describes polycarbosilane-base composition used for making membrane used in separation of liquids. The composition comprises polytrimethylsilylpropine and polydimethylsilylmethylene wherein polytrimethylsilylpropine has the general formula: 
with number of links in chain n = 1000-5000 (molecular mass MM = 11200-560000 Da) and polymethylsilylmethylene has the general formula: 
with number of links in chain n = 1200-17000 (MM = 86000-1200000 Da). These substances are components of the composition in the content of polydimethylsilylmethylene from 1.0 to 12.0 wt.-%. Also, invention relates to a method for making flat membrane as a monolith film based on the proposed composition. Invention provides the development of membrane showing high separation and flow factors and stability in acid media.
EFFECT: improved making method, valuable properties of composition and membrane.
5 cl, 2 tbl, 8 ex
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