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M. Zaborski, M. Skurska, M. Przybyszewska, T. Pingot, J. Zawadiak, B. Orlińska, D. Gillner

New organic peroxides as the agents curing elastomers

Polimery 2010, No 4, 293


DOI: dx.doi.org/10.14314/polimery.2010.293

Summary

The blends of butadiene - acrylonitrile rubber (HNBR) and ethylene - propylene rubber (EPM) were prepared and then cured with various amounts of peroxides as follows: traditionally used dicumyl peroxide (DCP) or new organic peroxides, synthesized by us, i.e. dibutyl-2,6-diisopropylnaphthalene peroxide (DBNP), 2-isopropylnaphthalene peroxide (2IPNP) or diisopropylnaphthalene peroxide (DIPNP) (Table 1). The values of scorching time τ02 (Table 2) and activation energy of the curing reactions of blends were determined. Curing density and efficiency were evaluated (Table 3, Fig. 2). The effects of different amounts of various curing co-agents [zinc dimethacrylate (DMZn) or zinc diacrylate (DAZn)] and a filler (pyrogenic silica) on the characteristics of vulcanizates were investigated (Fig. 1, 3, Table 5, 7). The mechanical properties of HNBR and EPM vulcanizates, cured with peroxide DCP or new peroxides (Table 4, 6) and containing or not a coagent and a filler, were compared. It has been found that commercial DCP can be replaced in curing reactions with other organic peroxides what let obtain the materials with higher curing density and better mechanical properties.


Key words: hydrogenated butadiene - acrylonitrile rubber, ethylene - propylene rubber, dicumyl peroxide, new organic peroxides, curing, properties


e-mail: martyna.skurska@poczta.onet.pl


M. Zaborski, M. Skurska, M. Przybyszewska, T. Pingot, J. Zawadiak, B. Orlińska, D. Gillner

New organic peroxides as the agents curing elastomers