Shape memory polymers have attracted extensive attention attributable to their characteristics and abundant applications. In this study, shape memory behavior and characterizations of poly(ε-caprolactone) (PCL) blended with poly(vinyl chloride) (PVC) and poly(methylmethacrylate) (PMMA) in different proportions were investigated. Some characteristics of the blended polymers, such as attenuated total reflection (ATR) infrared (IR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), SEM, and optical microscopy (OM) were accomplished. Both melting temperature (T_m) and glass transition temperature (T_g) were affected by blending polymers. The T_m was decreased from 57 °C to 51 and 49 °C by adding 30% and 50% of PVC to PCL, respectively; moreover, adding 50% PMMA to PCL reduced the T_m of PCL to 55 °C. The TGA results revealed that the temperatures at which the mass of blended polymers begins to lose sharply depend on the ratio of the constituents. It is found that the PCL has a crystalline structure, while PVC and PMMA have an amorphous structure. Shape recovery was not detected in the PCL:PMMA (1:1) since the PMMA polymer did not dissolve in PCL, and therefore, it prevented the homogeneity of the blend. Besides, a shape memory recovering test was performed for PCL:PVC (7:3), whereby the blend showed an excellent strain recovery.

形状记忆聚合物因其特性和丰富的应用而引起了广泛的关注。在这项研究中，形状记忆行为和聚（ε-己内酯）（PCL）与聚（氯乙烯）（PVC）和聚（甲基丙烯酸甲酯）（PMMA）以不同比例共混的特性进行了研究。完成了共混聚合物的某些特性，例如衰减全反射（ATR）红外（IR）光谱，差示扫描量热法（DSC），热重分析（TGA），SEM和光学显微镜（OM）。熔融温度（T _m）和玻璃化转变温度（T _g）都受到聚合物共混的影响。第t_米通过分别向PCL中添加30％和50％的PVC将温度从57°C降至51和49°C；此外，向PCL中添加50％PMMA可以将PCL的T _m降至55°C。TGA结果表明，共混聚合物质量开始急剧下降的温度取决于组分的比例。发现PCL具有晶体结构，而PVC和PMMA具有非晶结构。由于PMMA聚合物不溶于PCL，因此在PCL：PMMA（1：1）中未检测到形状恢复，因此阻止了共混物的均匀性。此外，对PCL：PVC（7：3）进行了形状记忆恢复测试，该共混物显示出优异的应变恢复。