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Design, synthesis, and characterization of main-chain, aromatic polyesters based on 3,4-ethylenedioxythiophene

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Title Design, synthesis, and characterization of main-chain, aromatic polyesters based on 3,4-ethylenedioxythiophene
 
Creator OJHA, UP
KUMAR, A
 
Subject thermotropic liquid-crystalline
polymers
thiophenes
polyureas
mesogens
furan
3,4-ethylenedioxythiophene
glass transition
heteroaromatic polyesters
thermogravimetric analysis (tga)
thermoplastics
thiophene-based liquid-crystalline polyesters
thiophene-based polyesters
 
Description A series of new thermoplastic polyesters based on 3,4-ethylenedioxythiophene (EDOT) with flexible aliphatic spacers have been synthesized and characterized for the first time. The thermal properties of these polyesters based on EDOT are comparable to those of conventional polyesters based on the 1,4-phenyl unit, indicating that EDOT is a viable replacement for the phenyl units. The glass-transition and melting-transition temperatures decrease monotonically with an increase in the spacer length. Theoretical calculations have revealed that the core angle for EDOT is comparable to that of unsubstituted thiophene and hence should be compatible with the formation of the mesophase. This has been confirmed experimentally by the synthesis of a main-chain, thermotropic, liquid-crystalline polyester based on EDOT that exhibits fluid birefringence. In fact, this is the first report in which a main-chain, liquid-crystalline polymer based on 3,4-disubstituted thiophene has been successfully designed and synthesized. (c) 2006 .
 
Publisher JOHN WILEY & SONS INC
 
Date 2011-08-04T13:06:25Z
2011-12-26T12:54:44Z
2011-12-27T05:42:58Z
2011-08-04T13:06:25Z
2011-12-26T12:54:44Z
2011-12-27T05:42:58Z
2006
 
Type Article
 
Identifier JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 44(11), 3479-3486
0887-624X
http://dx.doi.org/10.1002/pola.21414
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9370
http://hdl.handle.net/10054/9370
 
Language en