Printer Friendly

Light-Emitting Polymers.

U.S. Patent 8,697,982 (April 15, 2014), "Light-Emitting Polymer," James W. Smith, and Bruce McKague (LEP America, Incorporated, Bloomfield Hills, Michigan, USA).

Light-emitting materials are used for self-illuminated signs and nuclear batteries. One example consists of polystyrene labeled with tritium that emits beta particles. The polymer is doped with a phosphor, emitting visible light when irradiated by the beta particles from the tritium. Instability because of phosphor diffusion is a problem for these systems.

Smith and McKague developed a stable radiation-emitting material based on a silicone with tritium and a wavelength-shifter side chain (phosphor) bonded to the silicone. The wavelength-shifter contains a cyclic, aromatic group emitting light in response to the tritium beta particles. The wave shifter content is 0.015 g per gram of silicone.

COPYRIGHT 2014 Society of Plastics Engineers, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2014 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Author:Corneliussen, Roger
Publication:Plastics Engineering
Article Type:Brief article
Geographic Code:1USA
Date:Jul 1, 2014
Previous Article:Foam Implants.
Next Article:High-Temperature Crosslinking.

Terms of use | Privacy policy | Copyright © 2021 Farlex, Inc. | Feedback | For webmasters |