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

Xiaodong Wang, Haibao Lu*, Galina Gorbacheva*, Mokarram Hossain, Richard Fu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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 further used to model the cooperative dynamics of glass and melting transitions, respectively. Commutative dynamics and glass/melting transitions are further investigated to achieve custom-designed 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.
Original languageEnglish
Article number045003
JournalSmart Materials and Structures
Volume30
Issue number4
Early online date22 Feb 2021
DOIs
Publication statusPublished - 1 Apr 2021

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