2014 (3) 9

Regularity of flowing and structure-formation in polypropylene–polyvinylalcohol–silica mixture melts

N.M. Rezanova. M.V. Tsebrenko, I.A. Melnik, A.V. Korshyn, G.P. Danilova

Kyiv national university technology and design

2, Nemirovitha-Danchenko str., Kyiv, 01011, Ukraine

Polym. J., 2014, 36, no. 3: 282-288.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

Influence of content and method of mixing of nanosized methylsilica on interphase phenomena in polypropylene–plasticized polyvinilalcohol mixture melts (PP–PVS)has been investigated. The possibility of regulation of structure-formation processes under flowing of these mixture melts at the expense of the interphase tension decreasing and increasing of thermodynamical stability of polymer dispersed phase liquid stream has been shown/ Improving of PP fiberforming in PVS matrix has been found. The methyl silica additives increase the ability of melts to longitudinal deformation and in most cases have no influence on their rheological properties. The lower of swelling extrudates is a peculiarity of nanofilled composites. Action of nanoadditive is likely in its influence on interphase phenomena in this multicomponent system taken into account the sizes of particles and methyl groups on their surface. PVS is soluble in water after repeated extrusions and can used at obtaining of PP microfibers and thin fibrous materials on their basis.

Keywords: blends, nanoadditive, melts, structure-formation, viscosity.