Thermoresponsive Shape Memory Polymer Based on Polylactic Acid/Styrene-Butadiene-Styrene Blends with Different Inorganic Metal Fillers

Abstract:

In this study, polylactic acid (PLA) blended with 30 wt% styrene-butadiene-styrene (SBS) (70PLA/30SBS) was added with different fillers; Erbium Oxide (Er₂O₃), Halloysite Nanotubes (HNT) and Tungsten Carbide (WC₂) to investigate the effect of the filler on the shape fixity (R_f) and shape recovery (R_r) at different deformation and recovery times, rheological and morphological properties. The tubular structure of HNT led to the reduction of R_f when immersed longer during the deformation phase. Meanwhile, the presence of Er₂O₃ improved the R_r and R_r with longer deformation and recovery times, respectively. The blend with HNT has the highest viscosity while the blend with 70PLA/30SBS-Er₂O₃ indicated lower viscosity than the unfilled blend. All filled blends indicated the sea-island structure with the SBS droplets in PLA continuous phase. The elements identification made on the surface of the samples illustrates that the fillers were well-distributed in 70PLA/30SBS blends. The insignificant improvement of shape memory in the presence of the thermal conductive fillers due to the dominance of the restriction of chain motion due to the presence of fillers compared with increment of thermal conductivity at low filler loading.

• Periodical: Materials Science Forum (Volume 1102)
• Pages: 11-19
• DOI: https://doi.org/10.4028/p-X1j78C
• Online since: October 2023
• Authors: Fathin Hani Azizul Rahim, Arjulizan Rusli*
• Keywords: Metal Fillers, Polylactic Acid Blend, Shape Memory Polymer

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