THE ROLE OF MONOMERIC AND DIMERIC OLIGOMERS OF METHYL ETHYL KETONE PEROXIDE IN THE CURE OF UNSATURATED RESIN FORMULATIONS

摘要

The most readily synthesized forms of methyl ethyl ketone peroxide (MEKP) are its monomeric (2,2-dihydroperoxybutane) and dimeric (2-hydroperoxy-2-[l-hydroperoxy-1 -methylpropylperoxy]butane) oligomers. Methyl ethyl ketone peroxides are used to initiate cures at ambient temperatures, and are popular for processes that include resin transfer molding, filament winding and casting. Analytical methods have been used to quantify the amounts of residual hydrogen peroxide, MEKP monomer, and MEKP dimer in commercial formulations. This paper will discuss the effect of methyl ethyl ketone peroxide monomer and dimer, and hydrogen peroxide in the cure of orthophthalic, isophthalic, and vinyl ester resins. It will show how variations in these MEKP components affect the overall cure performance of resin systems.