Poly(propylene fumarate phthalate) and acrylic acid radical copolymerization constants and parameters Poly(propylene fumarate phthalate) and acrylic acid radical copolymerization in dioxane solution at various molecular ratios of original monomeric mixture was studied in this work for the first time. An unsaturated polyester resin was obtained using the polycondensation reaction. The composition of the obtained poly(propylene fumarate phthalate) was determined according to elemental analysis. The studied copolymers are promising for further study due to their swelling ability, antioxidant activity, and biodegradable ability. Copolymerization reaction kinetics has been studied. The composition of the copolymers was determined using chromatemass spectrometry. Radical copolymerization constants and parameters have been calculated by Mayo-Lewis integral method. Based on the copolymerization constants the Q-e parameters was calculated according to the Alfrey-Price equation. It was proved that non-solvable polymers of a net-shaped structure are formed in the whole range of the researched comonomer ratios during the radical copolymerization of p-PFF with AА. Based on the results presented in the article, we can say that all copolymer compounds based on poly(propylene fumarate phthalate) and acrylic acid demonstrate the ability to control physical and chemical properties. This in turn will allow to create new materials with a pre-defined behavior program. It was found that the unsaturated polyester resin is characterized by a lower reactivity in case of acrylic acid and poly(propylene fumarate phthalate) copolymerization.

Research of the influence of external factors on copolymers based on unsaturated polyester resins The article is devoted to the research of the influence of external factors on copolymers based on poly (propylene fumarate phthalate) and acrylic acid. In this paper, the effect of organic solvents and pH of the medium on the rate of swelling of synthesized copolymers is studied. The rate of polymer swelling depends on many factors, including: the nature of the polymer and the solvent, the presence of electrolytes, changes in pH and ambient temperature, the molecular weight of the polymer, and so on. It is assumed that the polymer network of copolymers consists mostly of unsaturated polyester resin links. Research results show that the ratio of monomer units in the copolymer significantly affects the susceptibility of the polymer gel to the pH of the medium and the presence of organic solvents (DMSO, DMFA, ethanol). It is proved that changing the properties of the comonomer allows you to obtain hydrogels that can swell or collapse due to changes in the ionic strength or thermodynamic quality of the solution. By varying the ratio of comonomers of the links was adjusted by the intervals of the swelling and compression of the polymer networks. The molecular weight of poly (propylene fumarate phthalate)was determined by gel-penetrating chromatography. The identification and composition of copolymers were determined by IR spectroscopy and HPLC, respectively.

Selection of optimal conditions for obtaining of Co nanoparticles in the matrix of polymeric hydrogels Results of the influence of external factors on process of immobilization of metal nanoparticles on copolymers based on unsaturated polyester resins with unsaturated carboxylic acids were considered in the article. The effects of concentration of cobalt chloride solutions and distribution of metal particles by sizes in the matrix were studied. Results showed that increasing of cobalt concentration in solution shifts the equilibrium towards the formation of larger particles, i.e. there is a tendency to flocculation and formation of bi-and polymodal dispersions. The dependence of the dispersion formed at reduction of metal containing particles on the reducing agent and its concentration were researched. Potassium hypophosphite and sodium tetrahydroborate were used as reducing agents. It was found that upon reduction by sodium tetrahydroborate of cobalt nanoparticles have larger sizes than by using potassium hypophosphite.