Issue 45, 2011
From the journal:

Journal of Materials Chemistry

Coumarin imparts repeated photochemical remendability to polyurethane†

Jun Ling,a   Min Zhi Rong*b  and  Ming Qiu Zhang*b  

* Corresponding authors

a Key Laboratory for Polymeric Composite and Functional Materials of the Ministry of Education, DSAPM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou, P. R. China

b Materials Science Institute, Sun Yat-sen (Zhongshan) University, Guangzhou, P. R. China
E-mail: cesrmz@mail.sysu.edu.cn, ceszmq@mail.sysu.edu.cn
Fax: +86-20-84114008
Tel: +86-20-84114008

Abstract

Coumarin, a traditional perfume substance, serves as a photosensitive crosslinker to construct a polyurethane network. Upon mechanical damage or ultraviolet illumination at a wavelength of 254 nm, the coumarin dimers on the fractured surface that link the polyurethane backbones with one another are cleft, and can be reconnected via irradiation at 350 nm. By using this feature, cracks on the polymer are mended by ultraviolet exposure or even sunlight without the aid of any catalyst. Owing to the reversibility of the photocyclization of coumarin moieties, multiple cycles of crack mending are allowed, as demonstrated by both qualitative and quantitative characterization. This repeated photo-remendability enables the polyurethane to heal the same site in the material more than once, which is of value for practical applications.

Graphical abstract: Coumarin imparts repeated photochemical remendability to polyurethane

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C1JM13467A
Article type
Paper
Submitted
21 Jul 2011
Accepted
14 Sep 2011
First published
18 Oct 2011

J. Mater. Chem., 2011,21, 18373-18380

Permissions

Request permissions

Coumarin imparts repeated photochemical remendability to polyurethane

J. Ling, M. Z. Rong and M. Q. Zhang, J. Mater. Chem., 2011, 21, 18373 DOI: 10.1039/C1JM13467A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements