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Multi-modal commutative dynamics in semi-crystalline polymers undergoing multiple shape memory behavior

Xiaodong Wang, Haibao Lu, Galina Gorbacheva, Mokarram Hossain Orcid Logo, Yong Qing Fu

Smart Materials and Structures, Volume: 30, Issue: 4, Start page: 045003

Swansea University Author: Mokarram Hossain Orcid Logo

Abstract

Semi-crystalline polymers offer great opportunities for design and tuning of multi-shape memory effect (multi-SME) through their programmable melting transitions. However, coexistence of amorphous and crystalline components as well as their multiple interfaces results in complex cooperative dynamics...

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Published in: Smart Materials and Structures
ISSN: 0964-1726 1361-665X
Published: IOP Publishing 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa56240
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Abstract: Semi-crystalline polymers offer great opportunities for design and tuning of multi-shape memory effect (multi-SME) through their programmable melting transitions. However, coexistence of amorphous and crystalline components as well as their multiple interfaces results in complex cooperative dynamics. In this study, we propose a one-dimensional (1D) multi-modal dynamic model to describe the commutative and cooperative dynamics in semi-crystalline shape memory polymers (SMPs) undergoing multi-SME. A three-phase model and Takayanagi principle are firstly applied to study the cooperative dynamics of amorphous/crystalline components and their interfaces. Phase transition theory and modified Avrami theory are used to model the cooperative dynamics of glass and melting transitions, respectively. Commutative dynamics and glass/melting transitions are further investigated to achieve on-demand multi-SME and shape recovery behaviors. Finally, effectiveness of the newly established model was demonstrated to predict triple-SMEs and quadruple-SMEs in semi-crystalline polymers reported in literature, and the theoretically obtained results show good agreements with the experimental ones.
Keywords: semi-crystalline polymer, commutative dynamics, shape memory effect
College: College of Engineering
Funders: National Natural Science Foundation of China (NSFC) under Grant No. 11725208 and UK Newton Mobility Grant (IE161019) through Royal Society and NFSC.
Issue: 4
Start Page: 045003