Miscibility enhancement through hydrogen bonding interaction of biodegradable poly(3‐hydroxybutyrate) blending with poly(styrene‐co‐vinyl phenol) copolymer

Differential scanning calorimetry, one- and two-dimensional Fourier transform infrared (FTIR), and solid state nuclear magnetic resonance (NMR) spectros- copy have been used to investigate the miscibility of and specific interactions between poly(styrene-co-vinyl phenol) (PSOH) and poly(3-hydroxybutyrate) (PHB) upon varying the vinyl phenol content of the PSOH copolymer. The FTIR and solid state NMR spectra revealed that the phenol units of PVPh interact with the carbonyl groups of PHB through intermolecular hydrogen bonding. A miscibility window exists when the vinyl phenol fraction in the co- polymer is greater than 22 mol % in the PSOH/PHB blend system, as predicted using the Painter-Coleman associa- tion model. V C 2010 Wiley Periodicals, Inc. J Appl Polym Sci 119: 300-310, 2011

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