Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China.
J Hazard Mater. 2010 May 15;177(1-3):773-80. doi: 10.1016/j.jhazmat.2009.12.100. Epub 2010 Jan 4.
Preparation of methyl methacrylate (MMA)/divinylbenzene (DVB) and ethylene glycol dimethacrylate (EGDMA)/DVB copolymers via suspension polymerization yielded precursors which possess residual vinyl groups. Post-crosslinking of appropriate dichloroethane swollen precursors without external crosslinking agent in the presence of anhydrous ferric chloride (FeCl(3)) yielded post-crosslinked resins with high surface area and suitable polarity. FT-IR spectrum indicated that increasing the proportion of MMA or EGDMA in monomer mixtures notably reduces the amount of the pendant vinyl groups onto the matrix of the precursors. Furthermore, the pendant vinyl groups of precursors were almost absent when the content of MMA and EGDMA increased to 40 mol% and 20 mol% in the monomers, respectively. The specific surface areas and pore volumes of copolymers showed a remarkable increase after post-crosslinking. Experimental results showed that isotherms of phenol adsorption onto these polymeric adsorbents could be represented by Freundlich model and Langmuir model reasonably. PDE-5 pc exhibited higher adsorption capacity of phenol than other adsorbents, which resulted from synergistic effect of larger specific surface area and polar groups onto the network. Column adsorption/desorption dynamic curves suggested that PDE-5 pc is a potential candidate for treatment of chemical effluent containing phenol and phenolic pollutants.
通过悬浮聚合制备甲基丙烯酸甲酯（MMA）/二乙烯基苯（DVB）和乙二醇二甲基丙烯酸酯（EGDMA）/DVB 共聚物，得到具有残留乙烯基的前体。在无水三氯化铁（FeCl(3)）存在下，不对适当的二氯乙烷溶胀前体进行外部交联剂交联，可得到具有高表面积和适宜极性的后交联树脂。FT-IR 谱表明，增加 MMA 或 EGDMA 在单体混合物中的比例显著降低了前体基质上悬挂乙烯基基团的数量。此外，当 MMA 和 EGDMA 的含量分别增加到单体的 40mol%和 20mol%时，前体的悬挂乙烯基基团几乎不存在。后交联后，共聚物的比表面积和孔体积显著增加。实验结果表明，这些聚合物吸附剂对苯酚的吸附等温线可以用 Freundlich 模型和 Langmuir 模型合理地表示。PDE-5 pc 对苯酚的吸附容量高于其他吸附剂，这是由于网络上较大的比表面积和极性基团的协同作用所致。柱吸附/解吸动态曲线表明，PDE-5 pc 是处理含苯酚和酚类污染物的化学废水的潜在候选物。
