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Citation: ZHONG Yu, SHEN Jun, WEI Rongqing, LIU Xiaoning. Removal of Cu-ion in Block Copolymer of PMMA-b-PLLA-b-PMMA Prepared via Atom Transfer Radical Polymerization by Washing-extraction Method[J]. Chinese Journal of Applied Chemistry, ;2011, 28(3): 254-257. doi: 10.3724/SP.J.1095.2011.00151 shu

Removal of Cu-ion in Block Copolymer of PMMA-b-PLLA-b-PMMA Prepared via Atom Transfer Radical Polymerization by Washing-extraction Method

1.
College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009

Corresponding author: LIU Xiaoning,
Received Date: 15 March 2010
Available Online: 26 August 2010
Fund Project: 国家高技术研究发展计划("863"计划)(2007AA02Z200,2007AA06A402)资助项目 ("863"计划)(2007AA02Z200,2007AA06A402)

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.
- ATRP,
- PMMA-b-PLLA-b-PMMA,
- removal of Cu ion,
- washing-extraction method
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