Polymer Composite Materials Based on Polylactide with a Shape Memory Effect for “Self-Fitting” Bone Implants

The development of adaptive medical structures is one of the promising areas of bioengineering. Polymer composite materials based on polylactide (PLA) are interesting not only for their properties, such as biocompatibility, mechanical properties, biodegradation, and convenience of use, but also for...

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Bibliographic Details
Published in:Polymers 2021-07, Vol.13 (14), p.2367
Main Authors: Zhukova, P. A., Senatov, F. S., Zadorozhnyy, M. Yu, Chmelyuk, N. S., Zaharova, V. A.
Format: Article
Language:English
Subjects:
Activation energy
Biocompatibility
Biodegradation
Bioengineering
Composite materials
Compression tests
Energy
Mechanical properties
Molecular structure
Molecular weight
Phase transitions
Plastic surgery
Polyethylene glycol
Polylactic acid
Polymer blends
Polymer matrix composites
Polymers
Reconstructive surgery
Shape effects
Shape memory
Smart structures
Surgical implants
Temperature
Transplants & implants
Viscoelasticity
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Summary:The development of adaptive medical structures is one of the promising areas of bioengineering. Polymer composite materials based on polylactide (PLA) are interesting not only for their properties, such as biocompatibility, mechanical properties, biodegradation, and convenience of use, but also for demonstrating shape memory effect (SME). In this study, reducing the activation initiation temperature and the SME activation energy was achieved by forming a composite based on PLA containing 10% poly (ε-caprolactone) (PCL). The effect of the plasticizer on the structure, mechanical properties, and especially SME of the composite, was studied by DSC, SEM, FTIR spectroscopy, compression tests, and DMA. By varying the composition, the beginning of the SME activation was reached at 45 °C, and the apparent activation energy of the process decreased by 85 kJ/mol, ensuring safe and effective use of the material as a precursor for temporary self-fitting scaffolds for reconstructive surgery.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13142367