ИСТИНА

Low surface energy and high wetting angles of fluorinated polymers make them very promising for creating omniphobic coatings that are capable of self-purification from inorganic and organic contaminants. To create coatings, films and other products with the required properties, fluorine-containing (co) polymers with a precisely known structure and molecular mass (MM) characteristics are necessary. The aim of this work is to synthesize amphiphilic diblock copolymers (DC) of 2,3,4,5,6-pentafluorstyrene (PFS) and 2-hydroxyethyl methacrylate (HEMA) with the required MM characteristics, as well as to study the effect of their structure on the morphology and repellent properties of fabric coatings from them [1,2] Synthesis of DC was carried out by a two-stage radical polymerization with reversible chain transfer by the addition-fragmentation mechanism. Narrow dispersed P(HEMA)-b-P(PFS) copolymers of different composition were obtained. The repellent properties of fabric coatings based on DC have been investigated. It has been established that the magnitude of contact wetting angles with water (θН2О) and diiodomethane (θCH2I2) of fabric samples treated with DC, despite the containing of hydrophilic HEMA-units, exceeds similar parameters for fabric impregnated with PFS homopolymer (θН2О = 102  2º and θCH2I2 = 74  1º). Moreover, the decrease in Mn of PHEMA-blocks from 19100 to 6500 is accompanied by an increase in θН2О from 120 ± 6º to 156 ± 3º and θCH2I2 from 93 ± 2º to 110 ± 2º