Styrene-hydroxystyrene copolymers blends

Fig. 6 TEM image of a 50 50 diblock copolymer blend of poly(isoprene-l)/ocfc-2-vinylpyridine) (IP) and poly(styrene-6ZocA -4-hydroxystyrene) (SH). Reprinted with permission from [44], 2005 American Chemical Society...

Comparison between the enthalpic parameters log(t) and AHoo %) for PVME or PMMA blends with PHS or styrene-hydroxystyrene (SHS) copolymers makes it possible to discuss the effect of hydrogen bond strength on aging. For example, FTIR measurements on a SHS copolymer with 71 mol.% hydroxystyrene (SHS71) indicated that the strength of the interaction increased in the order SHS71/PMMA... 

Demeftahi. M.V. Frechet, J.M.J. Study of the compatibility of blends of polymers and copolymers containing styrene, 4-hydroxystyrene and 4-vinylpyridine. Polymer 1988. 29. All. 

Figure 6.11 (a) Chemical structure of the block copolymer components designed to self-assemble hierarchically by H-bonding interactions between the blocks. PEO-b-P(S-r-4HS), poly(ethylene oxide)-b-poly(styrene-r-4-hydroxystyrene) P(S-r-4VP)-b-PMMA), poly (styrene-r-4-vinylpyridine)-b-poly(methyl methacrylate)], (b) Transmission electron microscopy image of a solvent-annealed blend fibn of supramolecular block copolymers, (c) A cartoon illustrating the final fibn structure and the block copolymer chain packing. 

Blends with Poly(vinyl phenol) or Poly(4-hydroxystyrene) (P4HS) and its Styrene Copolymers... 

Compatible blends of PC with certain vinyl polymers have been described (35). The compatibilizer acts in the presence of a transesterification catalyst under conditions that effect transesterification. The compatibilizer is a copolymer containing hydroxyl groups, e.g., made from a-methyl-p-hydroxystyrene and methyl methacrylate. Other hydroxyl groups containing monomers may be p-hydroxy-styrene and p-isopropenyl-o-cresol. 

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