The effect of temperatures on the phase behavior of A PPO/PS blends were studied by DSC. The blend system was found to exhibit both UCST and LCST behavior. It is also found that the thermally induced phase scparation is reversible.

• A~(49)ppo/pS_(19)共混体系热诱导相图同时存在高和低临界共溶温度,且此相行为是可逆的。