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7635580 
Journal Article 
Synthesis and Self-Association Behavior of Poly[bis(2-(2-methoxyethoxy)ethoxy) phosphazene]-b- Poly(propyleneglycol) Triblock Copolymers 
Chang, Y; Cho, S; Steely, L; Allcock, HR; , 
2009 
Yes 
Journal of Polymer Science. Part A, Polymer Chemistry
ISSN: 0887-624X
EISSN: 1099-0518 
WILEY 
HOBOKEN 
47 
3 
692-699 
English 
WOS:000262931800017 
Amphilic triblock copolymers with varying ratios of hydrophilic poly[bis (methoxyethoxyethoxy)phosphazene] (MEEP) and relatively hydrophobic poly(propylene glycol) (PPG) blocks were synthesized via the controlled cationic-induced living polymerization of a phosphoranimine (Cl3P=NSiMe3) at ambient temperature. A PPG block can function as either a classical hydrophobic block or a less hydrophobic component by varying the nature of a phosphazene block. The aqueous phase behavior of MEEP-PPG-MEEP block copolymers was investigated using fluorescence techniques, TEM, and dynamic light scattering (DLS). The critical micelle concentrations (cmcs) of MEEP-PPG-MEEP block copolymers were determined to be in the range of 3.7-16.8 mg/L. The mean diameters of MEEP-PPG-MEEP polymeric micelles, measured by DLS, were between 31 and 44 rim. The equilibrium constants of pyrene in these micelles ranged from 4.7 x 10(4) to 9.6 x 10(4). (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 692-699, 2009 
Amphiphilic triblock copolymers; Block copolymers; Cationic polymerization; Cationic-induced living polymerization; Hydrophilic poly[bis(methoxyethoxyethoxy) phosphazene]; Hydrophobic polypropylene glycol; Micelles; Polyphosphazenes