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Studies of the blue to red phase transition in polydiacetylene nanocomposites and blends

Published online by Cambridge University Press:  31 January 2011

Anitha Patlolla ,
Qi Wang ,
Anatoly Frenkel ,
James L Zunino III ,
Donald R Skelton  and
Zafar Iqbal
Anitha Patlolla
Affiliation:
anithapatlolla@gmail.com, New Jersey Institute of Technology, Chemistry and Environmental sciences, Newark, New Jersey, United States
Qi Wang
Affiliation:
qwang@bnl.gov, Yeshiva university, Physics, Newyork, New York, United States
Anatoly Frenkel
Affiliation:
frenkel@bnl.gov, Yeshiva University, Physics, NEWyork, New York, United States
James L Zunino III
Affiliation:
james.zunino@us.army.mil, U.S.Army ARDEC, Picattinny Arsenal, New Jersey, United States
Donald R Skelton
Affiliation:
donald.skelton@us.army.mil, U.S.Army ARDEC, Picattinny Arsenal, New Jersey, United States
Zafar Iqbal
Affiliation:
iqbal@adm.njit.eduiqbal@njit.edu, New Jersey Institute of Technology, Chemistry and Environmental sciences, Newark, New Jersey, United States
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Abstract

The conjugated polymeric backbone of polydiacetylenes (PDAs), comprising of alternating ene-yne groups, undergo intriguing stress-, chemical- or temperature-induced chromatic phase transitions associated with the disruption of the backbone structure and shortening of the conjugation length. PDAs, such as polymerized 10, 12 pentacosadiynoic acids (PCDA), when incorporated with inorganic oxides form nanocomposites and uniform blends with polymers. Blends of poly-PCDA with polymers, such as polyvinyl alcohol, polyvinylidene fluoride and cellulose increase the blue to red transition temperature without affecting the irreversibility of the red phase. However, the addition of zinc oxide to pure poly-PCDA makes the red phase highly reversible and substantially increases the blue to red transition temperature. The addition of TiO2 to poly-PCDA on the other hand does not affect the irreversibility of the red phase and the chromatic transition temperature. In order to understand the atomic scale interactions associated with these changes in the chromatic transitions, we have investigated both the nanocomposites and polymer blends using Raman and Fourier-transform infrared spectroscopy, and extended X-ray absorption fine structure (EXAFS) measurements

Keywords

compositeblendpolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1190: Symposium NN – Active Polymers , 2009 , 1190-NN11-04
Copyright
Copyright © Materials Research Society 2009

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