Blends of poly(hydroxy ether of bisphenol‐A) with poly(2‐vinylpyridine) and poly(4‐vinylpyridine)

Poly(hydroxy ether of Bisphenol‐A), so‐called Phenoxy resin (structure‐based IUPAC name: poly[oxy(2‐hydroxytrimethylene)oxy‐1,4‐phenyleneisopropylidene‐1,4‐phenylene]), is shown to be miscible with poly(4‐vinylpyridine) (P4VPy, poly[1‐(4‐pyridyl)ethylene]) and poly(2‐vinylpyridine) (P2VPy, poly[1‐(2‐pyridyl)ethylene]) over the entire composition range. Miscibility of the blends is evidenced by their glass transition temperatures being intermediate between the pure polymers for the blends of P4VPy and Phenoxy but being higher than the average for the case of the P2VPy/Phenoxy blends. Hydrogen bonding between the components was detected through infrared spectroscopy, which was also used in the study of mixtures of low‐molecular‐weight analogues, in order to calculate the free energies of mixing according to the association model of Painter and Coleman.