INVESTIGATION OF THE REGULARITIES OF PHASE
TRANSITIONS IN MULTICOMPONENT POLYMER BLENDS

I. A. Tsebrenko,a L. S. Dzyubenko,b  
And A. P. Nikolaevaa  

UDC 678.7

The influence of the compatibilizers of an ethylene<196>vinyl 
acetate copolymer and sodium oleate on the processes of melting and 
crystallization and the supermolecular structure of polypropylene/copolyamide 
blends of composition 20/80, 40/60, and 50/50 wt.% has been investigated. 
It has been shown that a specific fiberization is clearly realized 
in the compatibilized blends even for compositions corresponding to 
the region of phase change. Two to three peaks of crystallization 
of polypropylene in the blends containing an ethylene<196>vinyl acetate 
copolymer or sodium oleate have been revealed, which is attributed 
to the increase in the degree of dispersion of polypropylene as a 
result of the improvement in the specific fiberization and to the 
growth in the fraction of polypropylene in the interphase transition 
layer.

a Kiev National University of 
Technologies and Design, 2 Nemirovich-Danchenko Str., Kiev, 01601, 
Ukraine; email: mfibres@i.com.ua; b Institute 
of Surface Chemistry, National Academy of Sciences of Ukraine, Kiev, 
Ukraine. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 77, 
No. 6, pp. 97-104, November-December, 2004. Original article 
submitted January 31, 2004; revision submitted March 1, 2004.