Mieczysław Kucharski

New melamine resins. I. Synthesis of reactive solvents for melamine

Some results are presented on the studies of reactive solvents for melamine obtained from acetone and formaldehyde in the presence of potassium bicarbonate or triethylamine as catalysts. The chemical structure of the solvents, as well as their ability to dissolve melamine, have been determined. The mechanism of melamine dissolution in the reactive solvents has been analyzed by using the 1H-NMR technique.

Reactions of trithiocyanuric acid with oxiranes. I. synthesis of polyetherols

Reactions of trithiocyanuric acid with a large excess of ethylene oxide and propylene oxide in DMF solution and in the presence of triethylamine as catalyst were carried out. Trifunctional polyetherols containing an s-triazine ring were prepared. The structure of the products was confirmed by using elemental analysis, 1 H-NMR and IR techniques. Some of the physical properties and thermal stability of polyetherols were analyzed.

Copolymerization of hydroxyalkyl methacrylates with acrylamide and methacrylamide. I. Determination of reactivity ratios

The free-radical copolymerization of 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, and 3-chloro-2-hydroxypropyl methacrylate with acrylamide and methacrylamide was investigated. The reactivity ratios of the monomers were determined by the Fineman-Ross and Kelen-Tudos methods.

Reactions of trithiocyanuric acid with oxiranes. II. Kinetics and mechanism of reactions

The study of the kinetics of the addition of trithiocyanuric acid to oxiranes (i.e., ethylene oxide and propylene oxide) in DMSO solution in the presence of triethylamine as a catalyst is described. The effects of the acid group concentration, the concentration of oxirane, and the catalyst on the course of the reaction was studied. The rate equation describing the addition was derived. The reaction order with respect to the oxirane, catalyst, and reactive groups of the acid were 0.5, 0.5, and 1.5, respectively. The mechanism of addition was proposed. The influence of temperature on the course of the reaction was also studied. The activation parameters (ΔH#, ΔS#, ΔG#) were calculated.

Kinetics and mechanism of reaction between acrylic acid or methacrylic acid and some oxiranes in the presence of N, N‐dimethylaniline catalyst

The reactions of acrylic and methacrylic acids in ethylene oxide, propylene oxide, or glycerin epichlorohydrin were carried out in DMF in the presence of N, N-dimethylaniline catalyst. The kinetic equations describing these equations have been devised and activation parameters ΔH#, ΔS#, and ΔG# calculated. The mechanism of the reaction has been proposed and verified by using kinetic and instrumental methods

Copolymerization of hydroxyalkyl methacrylates with acrylamide and methacrylamide. II. Properties of the copolymers

Copolymers of 2-hydroxyethyl–methacrylate, 2-hydroxypropyl–methacrylate, or 3-chloro-2-hydroxypropyl methacrylate with acrylamide or methacrylamide having different compositions were synthesized by free radical bulk polymerization. Some of their properties, for example, density, polymerization shrinkage, Vicats softening point, glass transition temperature, hardness, and thermal and chemical stability were measured. The effect of the content of acrylamide or methacrylamide units on the properties of copolymers is discussed.