Synthesis and properties comparison of high oil absorption resins felled with paraffin or polybutadeene

It has been reported that flexible polymers, such as polybutadiene (PB) can be introduced as fillers into oil absorbing resins to improve the tight network structure, low oil absorption ratio and irreversible oil-releasing properties of these resins which are prepared usually only by chemical crosslinking. However, the double-bond of PB,can react with the monomers to introduce additional chemical crosslinks. In order to compare the synthesis and properties of high oil absorption resins filled with various, materials, paraffin, is used as a filler without any double-bond in the suspension copolymerization of dodecyl methacrylate, styrene and ethylene glycol dimethacrylate initiated by benzoyl peroxide. The effects of monomer recipe, concentration of fillers and chemical crosslinks on the oil absorption capacity and gel fraction of copolymers obtained are studied. It is found that the high oil absorption resin filled with PB has physical crosslinks, while the resin filled with paraffin has none. The oil absorption capacity as well as the gel fraction of the former increase with the increasing of PB amount, and its controlled release properties are also affected. Meanwhile, the oil absorption capacity of the latter also increase, but its gel fraction does not change with the increasing of paraffin content.