Created with Sketch.

2. Feb 2017 | Coatings Technologies

Increasing the stability of self-healing polymer networks

German researchers from Friedrich Schiller University Jena and Leibniz Institute for Photonic Technology have utilised a reversible thiol-ene click reaction to design novel self-healing polymers.

Increased stability in self-healing polymer networks based on reversible Michael addition reactions. Source: pixabay.com/CCO

These materials are based on a new methacrylate monomer featuring a benzylcyanoacetamide derivative, which is copolymerised with butyl methacrylate. Afterwards, the crosslinking is performed by the addition of a dithiol and a tetrathiol, respectively.

Reversible covalent bonds

Self-healing behaviour is obtained by heating the crosslinked polymers to 100 °C (150 °C) for several hours and is monitored by scratch healing experiments utilising an optical microscope. The thermal properties are studied in detail by differential scanning calorimetry as well as thermogravimetric analysis. Moreover, depth-sensing indentation measurements are performed to determine the mechanical properties. The healing process is based on the reversible cleavage/closing of the bonds (i.e., thiol-ene reaction), which could be demonstrated by Raman spectroscopy.

The study is published in: Applied Polymer Science.

EC Library BASF Handbook

Books

BASF Handbook Basics of Coating Technology

The industry’s most comprehensive handbook - now available in its 3rd edition: the BASF Handbook covers the entire spectrum from coatings formulation and relevant production processes through to practical application aspects. It takes a journey through the industry’s various sectors, placing special emphasis on automotive coating and industrial coating in general. The new edition has been completely updated, featuring several new sections on nanoproducts, low-emissions, biobased materials, wind turbine coating, and smart coatings.

Tags

This could also be interesting for you!

0 Comments

You are currently not logged in

To leave a comment, please log in.

Login
For continuously improving and optimizing our websites, we use cookies. By using our website, you agree to the usage of cookies. For more information, please visit our Privacy policy.
Accept