Synthesis and Micellization of PFP-PFS-PDMS

The GPC data in Table 1 show that both the PFP-PFS diblock and PFP-fi-PFS-Z)-PDMS triblock copolymers have narrow molecular weight distributions (MJM, 1.10) characteristic of living anionic polymerization. Because values 

Block Copolymers PFP -PFS , Block M /PDI M /PDP PFP -PFS,- nimit PDMS/ Morphology  

In the H NMR spectrum of PFP- t-PFS- t-PDMS, signals due to the phenyl group attached to phosphorus are clearly visible at 87.3 and 87.5. On the basis of the absolute number of repeats unit of PFP deduced from the P NMR spectrum, the overall composition of the polymer was calculated from the integrals of peaks representative of the PFS and PDMS blocks. For this purpose we chose as the reference the peak integrals of phenyl protons of the PFP block. We compared them with the SiMe2 protons associated with the PFS block (8=—0.50 ppm) and those associated with PDMS (e.g., 8=—O.lSppm). For the results of these calculations, see Table 1. 

Self-assembly of the ABC triblock copolymers was studied in hexane. Hexane is a nonsolvent for both PFP and for PFS, but a good solvent for PDMS. All micelle samples were prepared by slow addition of hexane to solutions of the polymer (0.1 wl/vol%) 

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