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Updated: Sep 22, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

Anhydride-Based Reconfigurable Shape Memory Elastomers.

Melodie I Lawton¹, Kelly R Tillman², Halimatu S Mohammed²

¹Syracuse Biomaterials Institute and Biomedical and Chemical Engineering Department, Syracuse University, Syracuse, New York 13244, United States.

ACS Macro Letters

|May 26, 2022

Summary

This summary is machine-generated.

This study introduces a novel shape memory elastomer. This material allows for the arbitrary reprogramming of both temporary and permanent shapes, overcoming limitations of traditional shape memory polymers.

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Last Updated: Sep 22, 2025

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Area of Science:

Materials Science
Polymer Chemistry

Background:

Traditional soft shape memory polymers possess a fixed permanent shape, necessitating new fabrication for altered geometries.
This limitation hinders the adaptability and reusability of shape memory materials in dynamic applications.

Purpose of the Study:

To develop a shape memory elastomeric composite with programmable permanent shapes.
To overcome the inherent inability to alter the permanent geometry of conventional shape memory polymers.

Main Methods:

Fabrication of a composite material using thermoplastic fibers and a polyanhydride-based elastomer.
Utilizing dynamic covalent exchange reactions above 50 °C to enable network chain reconfiguration.
Investigating the solid-state reconfigurability of the permanent shape.

Main Results:

The developed shape memory elastomeric composite exhibits tunable permanent shape capabilities.
Dynamic covalent chemistry allows for near-complete reconfiguration of the permanent shape in the solid state.
The material demonstrates arbitrary programming of both temporary and permanent shapes.

Conclusions:

The novel shape memory elastomer offers unprecedented control over permanent shape programming.
This advancement expands the potential applications of shape memory materials in fields requiring adaptable structures.
The material overcomes the limitations of fixed geometries in conventional shape memory polymers.