polyamide

A NEW OBTAINING METHOD OF TUBULAR PRODUCTS BASED ON POLYMER GELS

The method for obtaining composite hydrogel tubular products with the increased strength on the basis of copolymers of 2-hydroxyethylmethacrylate with polyvinylpyrrolidone has been developed. The method consists in the formation of hydrogel tubes with a subsequent precipitation from the solution into their outer surface of the reinforced layer based on polyamide, modified with polyvinylpyrrolidone.

Obtaining of nanocomposites based on montmorillonite and polyamide in solution

The method of obtaining nanocomposites based on polyamide-6 and montmorillonite intercalated by polyvinylpyrrolidone by precipitation from a solution in formic acid was developed in the work. The structure and physical interaction between the components of nanocomposites were studied by the methods of XRD, IR spectroscopic, and microscopic analyzes. The presence of polyvinylpyrrolidone in the structure of nanocomposites obtained from the solution was confirmed by IR spectroscopic analysis.

Formation Features of Tubular Products on the Basis of Composite Hydrogels

The method for obtaining composite hydrogel tubular products with the increased strength on the basis of copolymers of 2-hydroxyethylmethacrylate with polyvinylpyrrolidone has been developed. The method consists in the formation of hydrogel tubes with a subsequent precipitation from the solution into their outer surface of the reinforced layer based on polyamide, modified with polyvinylpyrrolidone.

The Role of Polyvinylpyrrolidone in the Formation of Nanocomposites Based on a Compatible Polycaproamide and Polypropylene

The interrelation of physico-mechanical and technological characteristics of newly created nanocomposites on the basis of polypropylene (PP)/polyamide (PA-6) mixture with PVP-modified montmorillonite has been investigated. The significant impact of modified polyamide on technological, physical and mechanical properties and heat resistance of polypropylene has been determined. It has been established that the melt flow index of the resulting composites increases by more than 2 times, compared with pure PP.

Investigation of structure of nanocomposites on the basis of mixture of polypropylene and modified polyamide with using scanning electronic microscopy.

Mixtures based on polypropylene (PP) and polyamide (PA) are of great importance as structural materials, the mixing of which reduces the negative characteristics of the original polymers. Non-polar PP significantly reduces water absorption of the material during mixing with polar high hydrophilic PA. As a result, the effect of moisture on the mechanical and thermal properties of the composites decreases. On the other hand, mixing PP with PA can extend the temperature range of material exploitation at negative temperatures.

THE FORMATION OF COMPOSITE FILM HYDROGEL MEMBRANES WITH POLYAMIDE LAYER

Polymer hydrogels, which are close to biological cells in their physical state, have proven to be effective in medicine and pharmacy. However, in practice the wide usage of hydrogel products is limited by their low mechanical strength, even though generally the application of hydrogels has a great potential . Recently, the interest to the polymer hydrogel materials, that have high mechanical strength in a hydrated state along with the hydrophilic and diffusion-transport properties, has increased.

Regularities of Films Forming on the Basis of Polyamide-Polyvinylpyrrolidone Mixtures

Modification of polyamide-6 by polyvinylpyrrolidone with molecular mass of 12000±2000 has been carried out using their mixing in formic acid solution followed by solvent evaporation. The possibility of films permolecular structure control, physico-mechnical and thermophysical properties by treatment conditions after their formation has been established.