The influence of nano-additives on the formation of matrix-fibrillar structure in the polymer mixture melts and on the properties of complex threads

Abstract

The influence of concentration of additives silver/silica (Ag/SiO2) and silver/alumina (Ag/Al2O3) on the processes of structure-formation in the thermodynamically incompatible mixtures of polypropylene/copolyamide (PP/CPA) and the properties of complex threads from nano-filled PP microfibers were researched. Nano-fillers, that were used, show the compatabilization action in the mixture, reducing the value of interfacial tension and increasing the degree of dispersion and deformation of drops of disperse phase. This leads to a decrease in the average diameter of PP microfibers and reduction of mass fraction of films and particles, which the more perfect matrix-fibrillar structure is forming. The researched silver-containing nano-additives provide to complex threads an antimicrobial properties and improve their mechanical properties.