Collective and cooperative dynamics in transition domains of amorphous polymers with multi-shape memory effect

Wang, Xiaodong, Lu, Haibao, Fu, Richard, Leng, Jinsong and Du, Shanyi (2020) Collective and cooperative dynamics in transition domains of amorphous polymers with multi-shape memory effect. Journal of Physics D: Applied Physics, 53 (9). 095301. ISSN 0022-3727

[img] Text
Wang+et+al_2019_J._Phys._D__Appl._Phys._10.1088_1361-6463_ab57d6.pdf - Accepted Version
Restricted to Repository staff only until 27 December 2020.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (1MB) | Request a copy
Official URL: https://doi.org/10.1088/1361-6463/ab57d6

Abstract

Multi-shape memory effect (multi-SME) in amorphous shape memory polymers (SMPs) linked with collective and cooperative rearrangements and accommodations of monomeric segments, thus leading to generation of complex thermodynamic modes. In this study, an extended domain size model is initially formulated to describe various temperature-dependent relaxation behaviors and domain transitions in amorphous SMPs. According to the Adam-Gibbs theory, a cooperative model is employed to identify the principle role of domain size in the collective dynamics of multi-SME in amorphous SMPs. The phase transition theory is then combined with multi-branch Kelvin model to describe the collective and cooperative relaxation behaviors of the SMPs with multiple transition domains. It is shown that the proposed model is able to characterize the thermomechanical transitions and multiple shape recovery processes. Finally, the model is applied to predict shape recovery behavior of SMPs with triple- and quadruple-SME, respectively, and the theoretical results are well validated by the experimental ones.

Item Type: Article
Subjects: F200 Materials Science
F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 15 Nov 2019 14:31
Last Modified: 09 Apr 2020 08:45
URI: http://nrl.northumbria.ac.uk/id/eprint/41455

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics