ACS Publications. Most Trusted. Most Cited. Most Read
My Activity
Recently Viewed
You have not visited any articles yet, Please visit some articles to see contents here.
CONTENT TYPES

Figure 1Loading Img
ADDITION / CORRECTIONThis article has been corrected. View the notice.

Two-Way Shape Memory Polymers: Evolution of Stress vs Evolution of Elongation

  • Andrés Posada Murcia
    Andrés Posada Murcia
    Faculty of Engineering Sciences and Bavarian Polymer Institute, University of Bayreuth, Ludwig Thoma Str. 36A, 95447 Bayreuth, Germany
  • Juan Manuel Uribe Gomez
    Juan Manuel Uribe Gomez
    Faculty of Engineering Sciences and Bavarian Polymer Institute, University of Bayreuth, Ludwig Thoma Str. 36A, 95447 Bayreuth, Germany
  • Jens-Uwe Sommer
    Jens-Uwe Sommer
    Leibniz Institute of Polymer Research Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
    Faculty of Physics, TU Dresden, 01069 Dresden, Germany
    Cluster of Excellence Physics of Life, TU Dresden, 01069 Dresden, Germany
  • , and 
  • Leonid Ionov*
    Leonid Ionov
    Faculty of Engineering Sciences and Bavarian Polymer Institute, University of Bayreuth, Ludwig Thoma Str. 36A, 95447 Bayreuth, Germany
    *Email: [email protected]
    More by Leonid Ionov
Cite this: Macromolecules 2021, 54, 12, 5838–5847
Publication Date (Web):June 2, 2021
https://doi.org/10.1021/acs.macromol.1c00568
Copyright © 2021 The Authors. Published by American Chemical Society
Article Views
1027
Altmetric
-
Citations
LEARN ABOUT THESE METRICS
Read OnlinePDF (3 MB)
Supporting Info (1)»

Abstract

Abstract Image

Stimuli-responsive polymers are a subject of numerous studies in recent decades due to its variety of possible applications ranging from nanomedicine, drug delivery systems, biosensing, to smart textile development and aerospace engineering. The current demand of reliable and easy-programmable polymeric-actuating components underlines the necessity to understand the mechanism that governs the actuation of materials. This work sheds new light on the understanding of the two-way shape memory effect (2W-SME) of cross-linked semicrystalline polymers. We investigated and compared melting/crystallization of cross-linked polycaprolactone under constant stress and constraint strain conditions. We observed three regions of behavior upon cooling: rubbery, semicrystalline, and an intermediate one associated with entropic softening of the network prior to crystallization. Based on obtained observations, we proposed possible mechanisms for the processes occurring in cross-linked polymers upon their crystallization/melting and quantitatively investigated the effects of applied stress, elongation, and cross-linking density to allow programmable design of reversible actuators.

Supporting Information

ARTICLE SECTIONS
Jump To

The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.macromol.1c00568.

  • Properties of cross-linked polycaprolactone (PCL) 80 kDa with different amounts of cross-linker; DSC results, the degree of crystallinity, and enthalpy of crystallization for PCL 80 kDa cross-linked with different amounts of DCP and TBP with a temperature step of 10 °C min–1; DMA results of PCL 80 kDa cross-linked with different amounts of DCP and TBP in the molten state at 70 °C; tensile test of PCL 80 kDa cross-linked with different amounts of DCP and TBP at 70 °C; mechanical properties of PCL TBP samples: (a) extensional storage modulus obtained from tensile and DMA experiments at 70 °C at 0.1 Hz; (b) values of cross-linking density (ν) obtained from extensional and DMA experiments; measurements in constant stress mode of stretched cross-linked crystallizing PCL (ν = 8 (a) and 40 mol m–3 (b) dependence of relative elongation of samples on applied stress); effect of cross-linking density from DMA analysis on stress–temperature behavior of stretched cross-linked PCL with TBP crystallizing: (a) effect of cross-linking density on evolution of stress with temperature, PCL was stretched by 200%; (b) dependence of temperatures of transitions from regimes I to II and from II to III on the cross-linking density; (c) dependence of the stress at different temperatures on the cross-linking density; (d) dependence of the stress drop close to crystallization in regime II on cross-linking density; (e) dependence of the relative stress drop on the cross-linking density; effect of elongation at constant cross-linking density on evolution of stress with temperature of cross-linked PCL containing 2% DCP (PDF)

Terms & Conditions

Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html.

Cited By

This article is cited by 3 publications.

  1. Youlei Tu, Yu Zheng, Shaoyun Guo, Jiabin Shen. Switchable Piezoelectricity of Polyvinylidene Fluoride Films Induced by Crystal Transition in Shape Memory Process. ACS Applied Materials & Interfaces 2022, 14 (35) , 40331-40343. https://doi.org/10.1021/acsami.2c11152
  2. Jin Wang, Zhikai Tu, Huanhuan Zhang, Meng-Meng Wang, Weifeng Liu, Jin-Ping Qu. Actuation Mechanisms of a Semicrystalline Elastomer-Based Polymer Artificial Muscle with High Actuation Strain. Macromolecules 2022, 55 (10) , 3986-3999. https://doi.org/10.1021/acs.macromol.2c00549
  3. Andrés Posada-Murcia, Juan Manuel Uribe-Gomez, Stephan Förster, Jens-Uwe Sommer, Martin Dulle, Leonid Ionov. Mechanism of Behavior of Two-Way Shape Memory Polymer under Constant Strain Conditions. Macromolecules 2022, 55 (5) , 1680-1689. https://doi.org/10.1021/acs.macromol.1c02564

Pair your accounts.

Export articles to Mendeley

Get article recommendations from ACS based on references in your Mendeley library.

Pair your accounts.

Export articles to Mendeley

Get article recommendations from ACS based on references in your Mendeley library.

You’ve supercharged your research process with ACS and Mendeley!

STEP 1:
Click to create an ACS ID

Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

MENDELEY PAIRING EXPIRED
Your Mendeley pairing has expired. Please reconnect

This website uses cookies to improve your user experience. By continuing to use the site, you are accepting our use of cookies. Read the ACS privacy policy.

CONTINUE