化学学报 ›› 2000, Vol. 58 ›› Issue (3): 368-370. 上一篇    

研究论文

PS-b-PEO-b-PS三嵌段共聚物在选择性溶剂中的胶束化

程时远;徐祖顺;袁建军   

  1. 湖北大学化学与材料科学学院
  • 发布日期:2000-03-15

The micellization of PS-b-PEO-b-PS triblock copolymers in selective solvent water

Cheng Shiyuan;Xu Zushun;Yuan Jianjun   

  • Published:2000-03-15

应用原子转移自由基聚合,制备了一组窄分布的PS-b-PEO-b-PS三嵌段共聚物。用^1HNMR和TEM表征了它们在选择性溶剂中的胶束化行为。^1HNMR结果表明,共聚物苯环上的质子峰出现在良溶剂(CHCl~3)中,而在选择性溶剂水中消失,证明上述三嵌段共聚物在选择性溶剂水中可逆自组装成以PS为核、PEO为壳的胶束。通过TEM考察了胶束的形状及大小,发现体系胶束尺寸呈多分散、粒径大,对形成的原因也提出了可能的解释。

关键词: 膦酸酯类, 呋喃酮P, 亚磷酸酯类, 元素分析, 红外分光光度法, 紫外分光光度法, 质子磁共振谱法, 碳13核磁共振谱法, 质谱法, X射线衍射分析

The micellization of well-defined PS-b-PEO-b-PS triblock copolymers in selective solvent has been characterized using ^1H NMR and TEM technologies. The ^1H NMR investigations reveal that the peaks of phenyl ring protons show up in CHCl~3 (good solvent) and disappear in water (selective solvent). Therefore, the triblock copolymers elf- asemble reversibly to form micelles with a core composed of the insoluble PS blocks and a shell of water-solvated soluble PEO blocks. The shape of micelles have been observed and the radius have been measured by TEM. The experimental results show that the size of micelles is polydispersed, ranging from 100 to 500nm. The possible reason has been discussed.

Key words: PHOSPHONIC ACID ESTER, FURANONE P, PHOSPHOROUS ACID ESTER, ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY, ULTRAVIOLET SPECTROPHOTOMETRY, PROTON MAGNETIC RESONANCE SPECTROMETRY, C13 NMR SPECTROMETRY, MASS SPECTROGRAPHY, X-RAY DIFFRACTION ANALYSIS

中图分类号: