Blends of novolac resins with epoxidized elastomers

Abstract

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.

New generalized Newtonian fluid models for quantitative description of complex viscous behavior in shear flows

“…The data come from own investigations. Some experimental results on various (not only rheological) properties of blends of novolack resins with epoxidized or non‐epoxidized elastomers were reported in the work . It is evident that the four‐parameter model ( Eq .…”

Polypropylene nonwovens with natural polymers addition for filtration applications

“…In order to change low degradation rate of polypropylene its composites with natural polymers are produced, e.g. composites with starch [7] and with different types of cellulose [8][9][10] are known. The higher addition of modifier the higher degradation rate of composite material but also the worse mechanical parameters of it are observed, so it is necessary to find a balance between environmental and applied benefits.…”