Abstract
Particle size and particle-size distribution in rubber-toughened polyamides 6 (PA6) were determined according to the Schwartz-Saltikov method. The quantitative morphological analysis was performed on microtomed samples of binary and ternary blends containing ethylene-propylene random copolymer (EPR) and functionalized EPR rubber (EPR-g-SA). The blends were obtained according to two different methods: concurrent to the hydrolitic polymerization of caprolactam, and simultaneous melt mixing. The formation of an (EPR-g-SA)-g-PA6 copolymer during blending was assumed to occur in the ternary blends. Correlations between particle size, particle size distribution, preparation method, composition and Izod impact strength of such materials were investigated.
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