INFLUENCE OF THE DEGREE OF COMPATIBILITY OF POLYMERS 
ON THE RHEOLOGICAL PROPERTIES OF A MIXTURE MELT AND 
THE PROCESSES OF STRUCTURE FORMATION

M. V. Tsebrenko, V. G. Rezanova, and I. A. Tsebrenko

UDC 541.64:532.135

A study has been made of the rheological properties of 
the melts and the processes of structure formation of polypropylene/copolyamide 
mixtures containing additions of individual compatibilizers and their 
mixtures: ethylene copolymer with vinyl acetate, sodium oleate, and 
siloxane liquids. The compatibilizing effect manifests itself as a 
decrease in the interfacial tension, which improves the fiberization 
of polypropylene in the copolyamide matrix. It is shown that the introduction 
of these additives makes it possible to realize the phenomenon of 
specific fiberization in the region of a phase change in the polypropylene/
copolyamide mixtures of composition 40/60, 50/50, and 60/40. 
The introduction of binary mixtures of compatibilizers is more efficient 
than the introduction of individual substances. The melts of such mixtures 
are characterized by a higher elasticity and a pronounced capacity for being 
longitudinally deformed.

Kiev National University of Technologies and Design, Kiev, 
Ukraine; email:vlasenko@ekma.Kiev.ua. Translated from Inzhenerno-Fizicheskii 
Zhurnal, Vol. 76, No. 3, pp. 68-75, May-June, 2003. Original 
article submitted December 2, 2002.