Influence of programming and recovery parameters on compressive behaviors of 4D printed bio‐compatible PVC‐PCL blends

Rahmatabadi, D, Aberoumand, M, Soltanmohammadi, K, Soleyman, E, Ghasemi, I, Baniassadi, M, Abrinia, K, Bodaghi, M ORCID: https://orcid.org/0000-0002-0707-944X and Baghani, M, 2024. Influence of programming and recovery parameters on compressive behaviors of 4D printed bio‐compatible PVC‐PCL blends. Advanced Engineering Materials. ISSN 1438-1656

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Abstract

This paper introduces a new class of bio-compatible shape memory polymers (SMPs) through blending PVC and PCL. The compressive shape-memory behaviors of 4D-printed SMP PVC with 5 and 10%wt of PCL are studied in detail. In this respect, a set of experiments are carried out to understand thermo-mechanical responses of PVC-PCL blends under various shape memory parameters like programming temperature, load holding time, applied strain and recovery temperature. DMTA and SEM imaging are also performed to provide thermal and morphological analyses. It is found that by raising the recovery temperature from 45 to 65°C, the shape recovery ratio increases from 5.63MPa to 7.92MPa when the PVC-PCL10 is programmed via the hot programming protocol. The highest level of shape fixity (100%) and the best performance of stress relaxation are achieved for hot programming sample, while the highest shape recovery ratio (100%) is obtained for cold programming. By applying the load holding time, the amount of shape fixity can reach from 88.14% to 100%. Results of this research are expected to provide an insightful understanding of the shape memory behaviors of PVC-PCL and be instrumental for 4D printing and programming of shape adaptive structures like shape-memory intervertebral cages as spinal support devices.

Item Type:	Journal article
Publication Title:	Advanced Engineering Materials
Creators:	Rahmatabadi, D., Aberoumand, M., Soltanmohammadi, K., Soleyman, E., Ghasemi, I., Baniassadi, M., Abrinia, K., Bodaghi, M. and Baghani, M.
Publisher:	Wiley
Date:	26 April 2024
ISSN:	1438-1656
Identifiers:	Number Type 10.1002/adem.202400301 DOI 1892510 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Jeremy Silvester
Date Added:	08 May 2024 08:22
Last Modified:	08 May 2024 08:22
URI:	https://irep.ntu.ac.uk/id/eprint/51401

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