Shape-Memory Polymer Nanocomposites of Poly(ε-caprolactone) with the Polystyrene- block -polybutadiene- block -polystyrene-tri- block Copolymer Encapsulated with Metal Oxides.

Autor: Gopinath S; Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University, Kottayam, Kerala 686560, India., Adarsh NN; School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala 686560, India., Nair PR; Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University, Kottayam, Kerala 686560, India., Mathew S; Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University, Kottayam, Kerala 686560, India.; School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala 686560, India.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2021 Feb 22; Vol. 6 (9), pp. 6261-6273. Date of Electronic Publication: 2021 Feb 22 (Print Publication: 2021).
DOI: 10.1021/acsomega.0c05839
Abstrakt: Shape-memory polymer composite (SMPC) blends with thermo-responsive shape memorizing capability have received increasing interest and have been a grooming research area due to their various potential applications. In this work, we report three thermo-responsive SMPCs derived from poly(ε-caprolactone) (PCL) and the polystyrene- block -polybutadiene- block -polystyrene-tri- block copolymer (SBS) encapsulated with CuO, Fe 2 O 3 , and CuFe 2 O 4 , namely, SMPC-CuO , SMPC-Fe 2 O 3 , and SMPC-CuFe 2 O 4 , respectively. We have also synthesized the neat shape-memory polymer matrix SMP in the context of the effect of the metal oxide encapsulates on the shape-memory property. Neat SBS rubber and PCL are used as the polymer-elastomer blend matrix to form SMP . The objective of this study is to understand the effect of these three metal oxide nanofillers encapsulated within the SMP matrix and their thermal, mechanical, and shape-memory properties. Morphological, thermal, mechanical, and shape-memory properties of the prepared SMPCs are completely characterized. It is revealed that the addition of nano-metallic-oxide fillers into the polymeric matrix significantly improved the overall properties of SMPCs. The tensile test confirmed that SMPC-CuFe 2 O 4 possesses a high tensile modulus and is found to be very rigid when compared to other SMPCs. The shape fixing property is found in the increasing order as follows: SMPC-CuO > SMPC-Fe 2 O 3 > SMP > SMPC-CuFe 2 O 4 . The better thermal, mechanical, and shape-memory performances were shown by the SMPC-Fe 2 O 3 composite, and thus, it can be considered as the better shape-memory polymer nanocomposite among all others. An optimum storage modulus was attained by SMPC-Fe 2 O 3 among the SMPCs. More interestingly, we have developed a microvalve actuator system using SMPC-Fe 2 O 3 , which could be useful for promising microsystem applications.
Competing Interests: The authors declare no competing financial interest.
(© 2021 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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