ИСТИНА

Biodegradable polymers are promising materials that combine good technological properties and a relatively weak impact on the environment. The growing interest in these materials creates a demand for the adaptation of production and molding methods to the specifics of biodegradable polymers. This paper is devoted to the study of the behavior of some copolymers of polylactide during the molding of nonwoven mats by the method of centrifugal molding. Materials of this type are currently used in medicine as a covering and dressing material, as well as in several other applications. The method of rotational molding consists in spraying a polymer solution through thin spinnerets of a rotating tank. As a result of the evaporation of the solvent and the extrusion of the resulting jet under the action of centrifugal force, fibers are formed. The method is characterized by simplicity of technological design and relative cheapness, which defines it as being of interest for adapting the molding method to biodegradable polymers. The laboratory system for rotary jet-spinning was tested on a fiber grade polylactide and several lactide based homo and copolymers. The dependence of spinnability the fibers quality on the molar mass, viscosity of the polymer solution and on the speed of rotation of the forming head, as well as the ability of these fibers to degrade under the action of the enzyme (proteinase-k), is considered.