物理化学学报 >> 1990, Vol. 6 >> Issue (02): 146-150.doi: 10.3866/PKU.WHXB19900205

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聚氧乙烯-聚氧丙烯嵌段共聚物加溶作用的研究

戴乐蓉; 陈佳   

  1. 北京大学物理化学研究所
  • 收稿日期:1988-09-27 修回日期:1989-03-23 发布日期:1990-04-15
  • 通讯作者: 戴乐蓉

Study on Solubilization of the Polyoxyethylene-Polyoxypropylene Block Copolymer

Dai Le-Rong; Chen Jia   

  1. Institute of Physical Chemistry, Peking University
  • Received:1988-09-27 Revised:1989-03-23 Published:1990-04-15
  • Contact: Dai Le-Rong

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摘要： 本文对聚氧乙烯-聚氧丙烯嵌段共聚物Pluronic的加溶性质和机制进行了研究. 结果表明仅有合适的HLB值的样品才具有加溶作用. L64的水溶液对芳烃有加溶作用, 对烷烃几乎没有. 随温度升高,发生加溶作用的L64最小浓度下降. 此外, 水也能被加溶在L64的二甲苯溶液中. 加溶有水的反胶团的大小比加溶有二甲苯的正胶团要大得多. 紫外光谱与核磁共振谱的研究表明, 对于PPO-PEO嵌段共聚物, 被加溶的二甲苯插在胶团内部的PPO链段之间。

Abstract: The nature and mechanism of solubilization of the block copolymer of polyoxye-thylene-polyoxypropylene glycols-Pluronic were investigated and the results showed that only the samples with appropriate HLB value were valid for solubilization. In aqueous solution of L64 the aromatic hydrocarbon could be solubilized, while the alkanes almost could not. The lowest concentration of L64 for solubilization decreased with the increase of the temperature.
Water could also be solubilizated in the xylene solution of L64. The size of the inverse micelles of solubilized water was much bigger than that of the micelles of solubilized xylene.
Ultraviolet and NMR spectroscopic studies showed that the xylene and toluene were included into the polyoxypropylene chains at the interior of the micelles for the PPO-PEO block copolymer.