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Title: An atomic finite element model for biodegradable polymers. Part 2. A model for change in Young's modulus due to polymer chain scission
Authors: Gleadall, Andrew
Pan, Jingzhe
Kruft, Marc-Anton
First Published: 31-Jul-2015
Publisher: Elsevier
Citation: Journal of the Mechanical Behavior of Biomedical Materials, 2015, 51, pp. 237–247
Abstract: Atomic simulations were undertaken to analyse the effect of polymer chain scission on amorphous poly(lactide) during degradation. Many experimental studies have analysed mechanical properties degradation but relatively few computation studies have been conducted. Such studies are valuable for supporting the design of bioresorbable medical devices. Hence in this paper, an Effective Cavity Theory for the degradation of Young's modulus was developed. Atomic simulations indicated that a volume of reduced-stiffness polymer may exist around chain scissions. In the Effective Cavity Theory, each chain scission is considered to instantiate an effective cavity. Finite Element Analysis simulations were conducted to model the effect of the cavities on Young's modulus. Since polymer crystallinity affects mechanical properties, the effect of increases in crystallinity during degradation on Young's modulus is also considered. To demonstrate the ability of the Effective Cavity Theory, it was fitted to several sets of experimental data for Young's modulus in the literature.
DOI Link: 10.1016/j.jmbbm.2015.07.010
ISSN: 1751-6161
eISSN: 1878-0180
Embargo on file until: 31-Jul-2017
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © the authors, 2015. After an embargo period this will be an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License ( ), which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Description: The file associated with this record is under a 24-month embargo from publication in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.
Appears in Collections:Published Articles, Dept. of Engineering

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