Abstract
In this paper, some results obtained at preparation of fibers from polypropylene and low-density polyethylene (LDPE) blends are presented. In the framework of this topic, the influence of the concentration of LDPE in PP on preparation conditions, rheological properties, mechanical and thermal properties, and structure of polymer blends and blended fibers was investigated. Experimental value of the melt viscosity shows the negative declination from the additive ones. PP and LDPE form an incompatible system. Prevailing content of PE component has a positive influence on flow properties of the melt. Technological compatibility of fiber-forming PP-LDPE blend is very good at 60—80% of “non-fiber-forming” LDPE. Very good processing was reached when the dispersed PP phase formed the microfibrils in polyethylene matrix. In this case, the polyfibrillar structure of blended fibers was formed.
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