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Effect of mercapto‐modified ethylene–vinyl acetate on the curing parameters and mechanical and dynamic mechanical properties of vulcanized nitrile rubber/ethylene–vinyl acetate blends
Author(s) -
Jansen Paulo,
Garcia Filiberto G.,
Soares Bluma G.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12887
Subject(s) - vulcanization , materials science , nitrile rubber , ethylene vinyl acetate , ultimate tensile strength , copolymer , vinyl acetate , curing (chemistry) , ethylene , natural rubber , differential scanning calorimetry , dynamic mechanical analysis , polymer chemistry , composite material , nitrile , polymer , organic chemistry , chemistry , catalysis , physics , thermodynamics
The compatibilizing effect of mercapto‐modified ethylene–vinyl acetate (EVALSH) was investigated in vulcanized nitrile rubber (NBR)/ethylene–vinyl acetate (EVA) copolymer blends. EVALSH increased the ultimate tensile strength, mainly in blends containing larger amounts of NBR. In addition, an accelerating effect of this functionalized copolymer was observed in blends vulcanized with the sulfur system. This behavior was confirmed with oscillating disk rheometry and differential scanning calorimetry analyses. The improvement of the mechanical performance was attributed to the interfacial action associated with the increase in the crosslink density of the NBR phase promoted by the mercapto groups in EVALSH. The effects of EVALSH on the morphology and dynamic mechanical properties were also studied. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2391–2399, 2003