scholarly journals Fluorescence Probe and Scanning Force Microscopic Studies of Water Soluble Comb-Shaped Copolymers Consisting of a Hydrophobic Poly(p-alkylstyrene) Main Chainand Hydrophilic Poly(ethylene oxide) Grafted Chains

2002 ◽  
Vol 34 (4) ◽  
pp. 253-260 ◽  
Author(s):  
Seigou Kawaguchi ◽  
Mohd Maniruzzaman ◽  
Kouji Katsuragi ◽  
Haruki Matsumoto, Iriany ◽  
Koichi Ito ◽  
...  
Author(s):  
Yoko Mizoue ◽  
Kazutoshi Haraguchi ◽  
Shin-ichi Yusa

Poly(2-methoxyethyl acrylate) (PMEA) and poly(ethylene oxide) (PEO) have protein-antifouling properties and blood compatibility. ABA triblock copolymers (PMEAn-PEO11340-PMEAn (MEOMn)) were prepared using single-electron transfer-living radical polymerization (SET-LRP) using a bi-functional PEO macroinitiator. Two types of MEOMn composed of PMEA blocks with a degree of polymerization (DP = n) of 85 and 777 were prepared using the same PEO macroinitiator. MEOMn formed flower micelles with a hydrophobic PMEA (A) core and hydrophilic PEO (B) loop shells in diluted water with a similar appearance to petals. The hydrodynamic radii of MEOM85 and MEOM777 were 151 and 108 nm, respectively. The PMEA block with a large DP formed a tightly packed core. The aggregation number (Nagg) of the PMEA block in a single flower micelle for MEOM85 and MEOM777 was 156 and 164, respectively, which were estimated using a light scat-tering technique. The critical micelle concentrations (CMCs) for MEOM85 and MEOM777 were 0.01 and 0.002 g/L, respectively, as determined by the light scattering intensity and fluorescence probe techniques. The size, Nagg, and CMC for MEOM85 and MEOM777 were almost the same inde-pendent of hydrophobic DP of the PMEA block.


2012 ◽  
Vol 45 (8) ◽  
pp. 3409-3418 ◽  
Author(s):  
Christoph Tonhauser ◽  
Markus Mazurowski ◽  
Matthias Rehahn ◽  
Markus Gallei ◽  
Holger Frey

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