The Studies Of Oil Absorber Based On Natural Rubber

Oil absorber based on Natural Rubber was prepared by mechanical blending with high oil-absorbable resin and Natural rubber compatibilized by NR-g-MAH or MMA . The high oil-absorbable resin was copolymerized by acrylate and the appropriate bulking agent . The optimal synthetic condition of high oil-absorbable resin and blending technology for natural rubber with high oil-absorbable resin were studied. The effect of high oil-absorbable resin content, compatibilizer content, kinds of compatibilizer (NR-g-MAH and NR-g-MMA) and grafting yeild of compatibilizer were studied. The structure of high oil-absorbable resin and compatibilizer and their blends were characterized by FTIR, TG, DMA and SEM individual.The results have been showed that it is different for oil absorption capacity to different oils in the same high oil-absorbable resin. The most high oil absorption capacity for tetrachloride is 23.61g/g, and the oil retention is more than 90%; the high oil- absorbable resin has excellent stability under 333.7℃. The result of FTIR has been showed that maleic anhydride and methyl methacrylate have grafted onto NR triumphantly. According to mechanical property and oil absorption capacity,the compatibilization of NR-g-MAH is better than NR-g-MMA, the mechanical property and oil absorption capacity of the oil absorber increase with the grafting yeild of the compatibilizer, the optimal ratio among NR, high oil-absorbable resin and compatibilizer in the blends is 100/10/5. The capacities of NR oil absorber are 37.48,32.45,29.26,23.06,16.79g/g for tetrachloride, toluene, benzene, diesel oil and engine oil individual. The oil retention all of the NR oil absorbers is more than 85%, and the second oil absorption capacity reaches to 32.18 g/g.The results of TG show that the thermal stability of NR oil absorber is higher than that of the high oil-absorbing resin. The results of SEM and DMA show that the dispersion of the blends and the interface between NR and high oil-absorbing resin have been improved by compatibilizer NR-g-MAH. No matter how the NR oil absorber blends have been swelling or not the mechanical properties of NR oil absorber (especially 100/10/5) are higher than 25MPa which is good enough to use in seal products.