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Poly (2,6‐dimethyl‐1,4‐phenylene oxide)/poly (butadiene) diol interpenetrating polymer networks: Phase morphological characteristics and glass transition temperature behavior

The fracture surface topography of simultaneous interpenetrating polymer networks (SIN'S) of poly (2,6-dimethyl-1,4 phenylene oxide) (PPO)/poly (butadiene)diol was examined by SEM. The phase morphology of the IPNs is highly dependent on PPO/poly(butadiene)diol mass ratio. A single-phase morphology of the IPNs was achieved when the content of poly(butadiene) diol is below 40 wt % in the initial composition. The SEM observations are also wholly consistent with the T g behavior obtained by DSC