Effect of polymer architecture of amphiphilic poly(2-oxazoline) copolymers on the aggregation and aggregate structure
Effect of polymer architecture of amphiphilic poly(2-oxazoline) copolymers on the aggregation and aggregate structure
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DOI：
10.1002/macp.200700140
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发表时间：
2007-07-03
影响因子：
2.5
通讯作者：
Papadakis, Christine M.
中科院分区：
文献类型：
--
作者：
Bonne, Tune B.;Ludtke, Karin;Papadakis, Christine M.
用荧光相关光谱研究了五种聚(2-恶唑啉)二嵌段、三嵌段和梯度共聚物在水中的胶束形成。通过2-甲基-2-恶唑啉连续或同时活性阳离子聚合合成了亲水性聚合物和疏水性聚合物链段的2-壬基-2-恶唑啉。部分聚合物在聚合物末端用TRITC进行荧光标记，用于FCS测量。在10(-8)-10(-3)m的浓度范围内测定了增溶聚合物均聚体和聚集体(胶束)的流体动力学半径，发现它们与聚合物的结构特征有关。
The micelle formation of five poly(2-oxazoline) diblock, triblock and gradient copolymers in water was investigated using fluorescence correlation spectroscopy. The polymers were synthesized by consecutive or simultaneous living cationic polymerization of 2-methyl-2-oxazoline for the hydrophilic and 2-nonyl-2-oxazoline for the hydrophobic polymer segments. Fractions of the polymers were fluorescence-labeled at the polymer termini with TRITC for the FCS measurements. The hydrodynamic radii of solubilized polymer unimers and of the aggregates (micelles) were determined in a concentration range of 10(-8)-10(-3) m and were found to depend in a characteristic way on the polymer architecture.