Block copolymers of polystyrene and

Mani S, Weiss RA, Williams CE, Hahn SF. Microstructure of ionomers based on sulfonated block copolymers of polystyrene and poly(ethylene-afe-propylene). Macromolecules 1999 32 3663-3670. 

Stabilization in Nonaqueous Radical Dispersion Polymerization with AB Block Copolymers of Polystyrene and Poly(dimethyl siloxane)... 

Block copolymers of polystyrene and PFOA, PS-6-PFOA, in CO2 were also extensively studied by SAXS, SANS (46, 47), high-pressure, high-resolution (HPHR) NMR (48) and pulsed magnetic field gradient (PFG) NMR (49). Neutron scattering data (46) showed that the micellar size increases with the PFOA mass, when holding MW of the PS component constant. The effect of CO2 density (0.27 to 0.84 g.cm ) at constant temperature (60 °C), and of temperature (29.5 to 76.2 °C) at constant CO2 density (0.733 g. cm ) was studied on PFOA/CO2 systems by HPHR NMR (48). 

Lotz B, Kovacs A (1969) Phase transitions in block-copolymers of polystyrene and polyethylene oxide. ACS Polym Prepr 10 820-825... 

New block copolymers of polystyrene and poly(e-caprolactone) have recently been prepared with a combination of coordination catalyst and anionic polymerization( An amorphous styrene block was prepared by conventional anionic polymerization at room temperature, and terminated with ethylene oxide. After hydrolysis the terminal - OH groups were substituted by oxo-Al-Zn alkoxide. A crystalline block was then added by coordination polymerization of e-caprolactam. 

Figure 10. The effect of carbon black contents on Couette correction of styrene block copolymer. SBR706 is the block copolymer of polystyrene and polybutadiene [31].

Davis, K. A., Charleux, B., and Mat aszewski, K. (2000). Preparation of block copolymers of polystyrene and poly(t-butyl acrylate) of various molecular weights and architectures by atom transfer radical pol5merization. J. Polym. ScL, Part A Polym. Chem., 55(12) 2274-2283. 

It has already been reminded that this l pe of polymerization is a fruitful source of interesting materials for practical applications and it seemed worthviMle, in the frame of this contribution, to Illustrate that point by some examples generated fzcm the study of the oxoalkoxide catalysts. In this prospect, a particularly significant achievemait is constituted by the block copolymers of polystyrene and polycaprolactone (29) (prepared as described in section III.B.), and the present section will be devoted to a brief denionstratlon, on these materials, of some potentialities of this type of approach. 

Scheme 33 Synthesis of (AB)3-type star block copolymer of polystyrene and polyether...

Enzymatic ROP has also been successfully combined with chemically catalyzed polymerization methods in SCCO2, allowing the formation of block structures. For example, Howdle and coworkers reported a simultaneous use of Novozym 435 with metalblock copolymers of PCL and PMMA [107, 108], whilst a two-step methodology was used to form block copolymers of PCL with poly(fluoro-octyl methacrylates) (PFOMA) [109]. Similar reactions, simultaneously combining reversible addition-fragmentation chain transfer (RAFT) with enzymatic ROP to form block copolymers of polystyrene and PCL, have also been performed in SCCO2 [110]. Block copolymer synthesis in SCCO2 has recently been reviewed [111]. 

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