Comparison of Temperature Effects on the Salting Out of Poly(ethylene glycol) versus Poly(ethylene oxide)−Poly(propylene oxide) Random Copolymer
Comparison of Temperature Effects on the Salting Out of Poly(ethylene glycol) versus Poly(ethylene oxide)−Poly(propylene oxide) Random Copolymer
复制标题
温度对聚乙二醇与聚环氧乙烷-聚环氧丙烷无规共聚物盐析影响的比较
DOI：
10.1021/ie901268m
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
R. Rogers
中科院分区：
文献类型：
--
作者：
M. Dilip;S. Griffin;S. Spear;H. Rodríguez;Christiaan Rijksen;R. Rogers
与许多聚（乙二醇）（PEGS），一种聚（乙烷氧化物） - 聚（丙烷氧化物）随机共聚物（EO-PO，EO/PO = 1：1.3）的分子量3320 g·mol-1称为Sunbright-3320（SB-3320），可以使用诸如（NH4）2SO4之类的水溶液从水溶液中腌制，以形成双层水溶液（ABS），以完成富含上层聚合物和下部盐的水相温度对这些液体/液体ABS的影响和相关的固体/液体树脂系统，其中一端已在各种聚合物和盐下确定了NH499TCO4的分布率，使聚合物的一端共价附加到固体支持。浓度和温度。与基于SB-3320的ABS相比3320个聚合物。
In common with many poly(ethylene glycol)s (PEGs), a poly(ethylene oxide)−poly(propylene oxide) random copolymer (EO−PO, with EO/PO = 1:1.3) of molecular weight 3320 g·mol−1, known as Sunbright-3320 (SB-3320), can be salted out of aqueous solution using kosmotropic salts such as (NH4)2SO4 to form aqueous biphasic systems (ABSs) comprising upper polymer-rich and lower salt-rich aqueous phases. The effects of temperature on these liquid/liquid ABSs and related solid/liquid resin-based systems, where one end of the polymer has been covalently attached to a solid support, have been studied. Distribution ratios of NH499TcO4 were determined radiometrically at various polymer and salt concentrations and temperatures. SB-3320-grafted poly(styrene) resins exhibit opposite effects of variable-temperature partitioning compared to the SB-3320-based ABS. However, the results are complicated because of the conformational changes that are possible for the SB-3320 polymer. Enthalpy and entropy changes were found to be te...