洗滤-萃取法去除ATRP法制备PMMA-b-PLLA-b-PMMA嵌段聚合物中的Cu离子

采用洗滤-萃取法去除原子转移自由基聚合法(ATRP)制备的聚甲基丙烯酸甲酯-聚L-乳酸-聚甲基丙烯酸甲酯(PMMA-b-PLLA-b-PMMA)嵌段共聚物中残留金属Cu离子。 结果表明，采用二氯甲烷(DCM)溶解共聚物，用水或酸水洗滤-萃取，当重复洗滤 萃取5次后，Cu离子的去除率能达到99%，所得嵌段共聚物的收率高于80%。 与过Al2O3层析柱或溶剂溶解 沉淀方法相比，洗滤-萃取法操作简单、可节省大量的有机溶剂，具有工业化前景。

Removal of Cu-ion in block copolymer of PMMA-PLLA-PMMA prepared via ATRP by washing-extraction method

This paper developed a washing-extraction method to remove the residual Cu-ion from the triblock copolymer of poly(methyl methacrylate)-b-poly(L-lactic acid)-b-poly(methyl methacrylate)(PMMA-b-PLLA-b-PMMA) prepared via atom transfer radical polymerization(ATRP). The result is that, when taking dichloromethane(DCM) as the solvent and water or acid as the extractant, the rate of removing Cu-ion can reach as much as 99% and the yield of the block copolymerization was more than 80% followed by washing and extracting 5 times. Compared with other methods, the washing-extraction method can not only save lots of organic solvent, but is also simple and effective. In addition, the washing-extraction method is a green technology, which might be used in the industry.