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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

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Published on: October 23, 2015

Elastomeric polyamide biomaterials with stereochemically tuneable mechanical properties and shape memory.

Joshua C Worch¹, Andrew C Weems¹, Jiayi Yu²

¹School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.

Nature Communications

|June 28, 2020

Summary

This summary is machine-generated.

Researchers developed new, easily processed polyamides with shape memory properties for biomedical applications. Controlling alkene stereochemistry allows tuning of mechanical and thermal properties for advanced biomaterials.

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Area of Science:

Polymer Chemistry
Materials Science
Biomaterials Engineering

Background:

Biocompatible polymers are crucial for tissue engineering and biomedical devices.
Existing long-term implant biomaterials have limitations in processability, property scope, and responsiveness.
There is a need for advanced polymers with tunable properties and shape memory capabilities.

Purpose of the Study:

To synthesize and characterize a novel class of easily processable polyamides.
To achieve stereocontrolled mechanical properties and high-fidelity shape memory behavior.
To explore the relationship between polymer stereochemistry and material properties.

Main Methods:

Utilized the nucleophilic thiol-yne reaction between a dipropiolamide and dithiol.
Synthesized polyamides with an α,β-unsaturated carbonyl moiety in the polymer backbone.
Controlled alkene stereochemistry (35-82% cis content) by adjusting reaction conditions.
Investigated the effect of stereochemistry on tensile strength, modulus, and glass transition temperature.
Explored property variations using different commercially available dithiols.

Main Results:

Successfully synthesized easily processable polyamides with shape memory behavior.
Demonstrated that alkene stereochemistry directly dictates bulk material properties.
Achieved a range of thermal and mechanical properties by varying dithiols.
Established a method for tuning material characteristics through stereochemical control.

Conclusions:

Developed a versatile class of polyamides with tunable mechanical and thermal properties.
The stereocontrolled thiol-yne reaction provides a pathway to advanced biomaterials.
These materials show promise for long-term implants and responsive biomedical devices.