CO2‐Based Non‐ionic Surfactants: Solvent‐Free Synthesis of Poly(ethylene glycol)‐block‐Poly(propylene carbonate) Block Copolymers
CO2‐Based Non‐ionic Surfactants: Solvent‐Free Synthesis of Poly(ethylene glycol)‐block‐Poly(propylene carbonate) Block Copolymers
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DOI：
10.1002/macp.201300586
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发表时间：
2013-12
影响因子：
2.5
通讯作者：
Jeannette Hilf;Patricia Schulze;H. Frey
中科院分区：
文献类型：
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作者：
Jeannette Hilf;Patricia Schulze;H. Frey
采用二氧化碳（CO2）和环氧丙烷（PO）共聚制得两亲性聚碳酸酯嵌段共聚物，共聚物具有亲水性聚乙二醇（PEG）嵌段和非极性聚碳酸丙烯（PPC）嵌段。以PEG或mPEG为引发剂，通过CO2/环氧丙烷交替共聚，合成了一系列分子量分布较窄（pdi在1.01 ~ 1.12之间）、分子量为1500 ~ 4500 g mol−1的聚碳酸丙烯（PPC）二嵌段共聚物和三嵌段共聚物PPC-b-PEG和PPC-b-PEG-b-PPC。测定临界胶束浓度（cmc），范围为3 ~ 30mg L−1。非离子型聚碳酸丙烯酯表面活性剂代表了基于聚醚结构的现有表面活性剂的替代方案。
Copolymerization of carbon dioxide (CO2) and propylene oxide (PO) is employed to generate amphiphilic polycarbonate block copolymers with a hydrophilic poly(ethylene glycol) (PEG) block and a nonpolar poly(propylene carbonate) (PPC) block. A series of poly(propylene carbonate) (PPC) di- and triblock copolymers, PPC-b-PEG and PPC-b-PEG-b-PPC, respectively, with narrow molecular weight distributions (PDIs in the range of 1.05–1.12) and tailored molecular weights (1500–4500 g mol−1) is synthesized via an alternating CO2/propylene oxide copolymerization, using PEG or mPEG as an initiator. Critical micelle concentrations (CMCs) are determined, ranging from 3 to 30 mg L−1. Non-ionic poly(propylene carbonate)-based surfactants represent an alternative to established surfactants based on polyether structures.