MISCIBILITY STUDY IN THE BLENDS OF NOVEL POLY(STYRENE-CO-4-VINYLPHENYLDIMETHYLSILANOL) AND POLY(N-BUTYL METHACRYLATE)

The miscibility of poly(styrene-co-4-vinylphenyldimethylsilanol) (ST-V PDMS) and poly(n-butyl methacrylate) (PBMA) blends has been investigat ed by means of DSC and FT-IR spectroscopy. It was found that miscible blends were formed only for the copolymers containing 9-34 mol % 4-vin ylphenyldimethylsilanol (VPDMS). The glass transition behavior of the miscible blends was analyzed by recently proposed equations in terms o f the physical meaning of the fitting parameters. The results of FT-IR study were found to be fully consistent with the observation of the m iscibility window obtained from glass transition temperature measureme nts. Quantitative information concerning intermolecular hydrogen bond interaction in the carbonyl stretching vibration region of the miscibl e blends was obtained by curve-fitting method. (C) 1994 John Wiley & S ons, Inc.