Novel of (PLA/PCL blend)/Gd₂O₃ rare earth oxide nanocomposites: Shape memory effect, thermal, magnetic, and mechanical properties

Abstract

Poly ɛ‐caprolactone (PCL) and poly lactic acid (PLA) stand out as biocompatible polymers. In this study, PCL and PLA were blended in 40:60 ratio, respectively, and then the Gd2O3 compound, which is an important earth element oxide, was mixed in PLA–PCL shape memory polymer (SMP) blend at different rates and polymer blend nanocomposites were obtained. First of all, the effects of Gd2O3 oxide on the thermal properties of the SMP blend were determined with a differential scanning calorimeter (DSC) and thermogravimetric analyzer (TGA), and it was determined that Gd2O3 did not have a significant effect on the melting temperature of the blend, while it significantly increased its thermal stability. As a result of the XRD (X‐ray diffraction) analysis of the composites at room temperature, it was determined that the semicrystalline blend, with the addition of Gd2O3, increased its crystalline property. When the shape memory effect was examined, it was understood that the additive did not eliminate the shape memory effect. When the magnetic property of the gadolinium oxide‐doped composite, which is magnetocaloric oxide, was examined, the magnetic property of the composite changed from diamagnetic to paramagnetic with increasing additives. Finally, the mechanical properties of the shape memory blend composite were investigated and no regular changes were observed in the mechanical properties with increasing Gd2O3.

A novel green synthesis approach for shape memory polymer nanocomposites decorated with silver nanoparticles

“…In addition, asymmetric -CH bending at 1454 cm À1 and symmetrical -CH bending at 1360 cm À1 are some of the notable strong signals. 42,43 Along with these strong signals, the absorbances of the signals at 1181 cm À1 and 1084 cm À1 , which are attributed to the C-O-C asymmetric and symmetric stretch vibrations, respectively, are quite strong and do not overlap with other signals. 44,45 Finally, the -CH bending in methylene, which is the characteristic signal of PCL, is present in all spectra at 860 cm À1 .…”

Shape Memory Polymer-Based Nanocomposites Magnetically Enhanced with Fe3O4 Nanoparticles

“…3 is examined, it means that it is an immiscible blend as both polymers show their own properties [ 31 , 32 ]. In the DSC curve of pure polymer blend, the curve at 66.5 °C is attributed to both the T g of PLA and the T m of PEG, while the curve at 176.9 °C is attributed to the T m of PLA [ 33 , 34 ]. In the DSC curves, there was a noticeable decrease in the T g values of PLA, especially with the increasing MNP ratio.…”

Recent trends in thermo‐responsive elastomeric shape memory polymer nanocomposites

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