Maro Publications

Stress Relaxation

Patent Abstracts

*5/3/2013 
from 4/23/2013

Maro Topics

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Patent Abstracts

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1. 8,404,758 
Stress relaxation in crosslinked polymers 

Bowman and Scott of the University of Colorado, Colorado, induced  reversible chain cleavage of polymer chains in a crosslinked polymeric material.  Reversible cleavage of the polymer backbone is capable of relieving stress in the polymeric material as the bonds reform in a less stressed state.  Reversible cleavage of the polymer backbone is enabled by incorporation of "reversible chain cleavage" groups or functionalities into the polymer backbone.  a reversible chain cleavage group is capable of both breaking and forming in-chain bonds. In an embodiment, the reversible chain cleavage group is a chain transfer group which undergoes addition-fragmentation type chain transfer.  Suitable addition-fragmentation functionalities or agents for use in the invention include conventional reversible addition-fragmentation chain transfer (RAFT) agents, allyl sulfides, dithiocarbamates, trithiocarbonates and thiuram disulfides.

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2013 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 4/23/2013.