Preparation and properties of composites consisting of two continuous interpenetrating phases, at least one of them is the polymer phase, are presented. Three different kinds of such composites are discussed: polymer-polymer (PVC-PMMA), polymer-mineral (PMMA-gypsum) and polymer-metal (PVC-Wood alloy). Composites were prepared by filling the porous matrix made of one component with other component in the liquid state which was then solidified by polymerization (PMMA) or cooling (Wood alloy). The obtained composites were characterized mainly by mechanical testing, e.g. elasticity modulus, flexural strength and Brinell hardness. In some cases other measurements, such as microscopic and electrical, were also carried out. It was found that obtained composites possess many interesting properties. The introduction of the second component into the matrix pores as a rule increases the mechanical properties by few times, even if its content is relatively small.

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Mieszaniny ¿ywic nowolakowych z epoksydowanymi elastomeramiStreszczenie -Przedstawiono wyniki badañ wybranych w³aoeciwooeci mieszanin ¿ywicy nowolakowej z kauczukiem naturalnym (NR/NBR) lub kopolimerem blokowym styren-butadien-styren (SBS/ESBS) o ró¿nym stopniu epoksydowania wi¹zañ podwójnych. Ró¿nice w³aoeciwooeci oewiad-cz¹ o przebiegu reakcji miêdzy sk³adnikami mieszanin. Stwierdzono, ¿e istotny wp³yw na w³aoeciwooeci a pooerednio na reaktywnooeae uk³adów wywieraj¹: stopieñ epoksydowania, rodzaj i udzia³ elastomeru oraz warunki utwardzania, tj. temperatura, czas i dodatek urotropiny. S³owa kluczowe: kauczuk naturalny, elastomer termoplastyczny, ¿ywica nowolakowa, reaktywne przetwarzanie, w³aoeciwooeci mechaniczne i reologiczne. BLENDS OF NOVOLAC RESINS WITH EPOXIDIZED ELASTOMERSSummary -This paper presents the results of a study on selected properties of the blends of novolac resin with natural rubber (NR/NBR) and styrene-butadiene-styrene block copolymer (SBS/ESBS) with various degree of double bond epoxidation. The differences in properties indicate that the reaction between blend components took place. It was found that the degree of epoxidation, the type and content of elastomer as well as the hardening conditions, i.e. temperature, time and urotropine addition, have a significant effect on the blend properties and indirectly on the reactivity of the system.

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