Maro Publications

Block Copolymers

Notes

*11/11/2013
from 6/27/2012   

Maro Topics

Comments

Patents Abstracts

Patent Titles

Block Copolymers: Applications

Copolymers

Thermoplastic Elastomers (TPE)

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Notes

ďA special kind of copolymer is called a "block copolymer". Block copolymers are made up of blocks of different polymerized monomers.  For example, PS-b-PMMA is short for polystyrene-b-poly(methyl methacrylate) and is usually made by first polymerizing styrene, and then subsequently polymerizing MMA from the reactive end of the polystyrene chains. This polymer is a "diblock copolymer" because it contains two different chemical blocks. Triblocks, tetrablocks, multiblocks, etc. can also be made. Diblock copolymers are made using living polymerization techniques, such as atom transfer free radical polymerization (ATRP), reversible addition fragmentation chain transfer (RAFT), ring-opening metathesis polymerization (ROMP), and living cationic or living anionic polymerizations.[5] An emerging technique is chain shuttling polymerization. The most powerful strategy to prepare block copolymers is the chemoselective stepwise coupling between polymeric precursors and heterofunctional linking agents. This method enables access to peculiarly exotic structures such as tetrablock quarterpolymers ABCD.

Recent research in block copolymers suggests that they may be useful in creating self-constructing fabrics with potential utility in semiconductor arrays (for example, computer memory devices) by assembling fine details atop a structured base created using conventional microlithography methods.

(Wikipedia, Block Copolymers, 6/27/2012)

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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 2012 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 6/27/2012.