用熔融共混法制备了不同组分的聚苯乙烯(PS)与聚氧化乙烯(PEO)共混物(PS/PEO).在玻璃转变温度Tg及其以上温区,利用相对能量耗散技术研究了该共混物的动力学行为.结果发现,在能量耗散-温度曲线上出现了两个弛豫型的耗散峰(α峰和α′峰).分析表明,α峰是与PS玻璃转变有关的特征耗散峰;α′峰则对应于一种“液-液转变”.两者的弛豫时间τ都不满足Arrhenius关系.此外,还研究了组分对这两个弛豫型耗散峰的影响,并给予了定性的解释. Polystyrene (PS) and polyethylene oxide (PEO) blends (PS / PEO) with different compositions were prepared by melt blending method. At the glass transition temperature Tg and above, the relative energy dissipation The kinetic behavior of the blends was studied and found that two relaxation-type dissipation peaks (α-peak and α-peak) appeared on the energy dissipation-temperature curve. Glass transition. The α ’peak corresponds to a “liquid-liquid transition.” Both of the relaxation times τ do not satisfy the Arrhenius relation. In addition, the effect of the composition on these two relaxation Type dissipation peak, and gives a qualitative explanation.