Abstract.1 This paper reports on a study of novel heterohydrogel materials with regular inclusions of the dispersed phase such as polystyrene latex nanoparticles. Synthesized 3D hydrogel matrices contain a balanced number of cross-links and a defined amount of polystyrene nanoparticles with 50 or 85 nm in radius. This study has shown that the obtained hydrogel matrices are capable of changing the swelling degree and their optical properties depending on the size and concentration of the dispersed nanoparticles. The results of the performed studies revealed that the synthesized 3D hydrogels are sensitive for even small changes of glucose concentration and therefore are very promising materials for biosensors.
The paper describes synthesis and colloidal properties of novel α-amino acid based polyesters with controllable hydrophilic-lipophillic balance. Polyesters based on glutamic acid and glycols of different nature were obtained via low-temperature activated polyesterification. Such polymers are able to form micellar structures in self-stabilized water dispersion. Peculiarities of Steglich rection in the case of polyesterefication and side processes were established and optimal conditions for polyester synthesis were determined.
Poly(phosphoeter)s (PPE)s are a class of polymers possessing a high chemical functionality and biodegradability. Novel, glutamic acid based poly(phosphoeter)s were synthesized by the Steglich reaction. The developed synthetic approach allows controlling the composition and the structure of PPEs, and therefore their physical and colloidal properties. The studies on solubilization and cytotoxicity in vitro proved the potential of PPEs for drug delivery applications.
1 The distribution coefficients of macromolecules of aminofunctional copolyesters with chromophore groups in the n-octanol-water system, as well as experimental and calculated characteristics of their hydrophilic-lipophilic balance (HLB) have been determined. A multiple regression analysis has been carried out and interpolation equation of the lipophilicity coefficient has been derived depending on the parameters characterizing the qualitative and quantitative composition of the copolyester. The factors which have the most significant influence on the lipophilicity factor and HLB of the obtained fluorescein-containing copolyester have been established.
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