石蜡填充型高吸油树脂脱油动力学

Oil Release Kinetics of High Oil Absorption Resins Filled with Paraffin

以甲基丙烯酸十二酯(DMA)、苯乙烯(St)等为单体,用悬浮聚合的方法合成了高吸油树脂。研究了高吸油树脂的脱油性能,讨论了化学交联剂、填充剂石蜡以及引发剂过氧化二苯甲酰(BPO)对其脱油性能的影响。结果表明:化学交联剂用量越高,脱油越慢,但脱油平衡时间较短;使用石蜡填充虽可增加最大吸油率,但对脱油性能没有影响;引发剂用量增大,树脂最大吸油率下降,脱油较慢。在有关理论的基础上计算脱油扩散系数;采用较合适的动力学模型描述了高吸油树脂的脱油行为,并对比了理论和实验结果,发现脱油动力学模型可以预测脱油趋势。

High oil absorption resins （SOAR） were synthesized using methyl dedocyl acrylate and styrene as monomers by suspension polymerization. Effects of the dosage of chemical cross-linking agent, initiator and paraffin on the kinetics of oil release for high oil absorption resin were investigated. It was found that the dosage of chemical cross-linking agent increase, the oil release of SOAR could decrease, while the equilibrium time of oil release was shorter. Using paraffin, the maximum of oil absorption increased, but could not affect the oil release. With the increase of the initiator dosage, the maximum of the oil absorption and the oil release decreased. The diffusion coefficient（D） was calculated by the Toro equation. The curves of experimental data agreed with theoretical curves well, which indicated that the spherical diffusion model could be used to describe the kinetics of the oil release.