Low Tg, Stretchable Polyaniline of Metallic-Type Conductivity: Role of Dopant Engineering in the Control of Polymer Supramolecular Organization and in the Tuning of Its Properties
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- 作者：Bruno Dufour ; Patrice Rannou ; David Djurado ; Henryk Janeczek ; Malgorzata Zagorska ; Arnaud de Geyer ; Jean-Pierre Travers ; and Adam Pron
- 刊名：Chemistry of Materials
- 出版年：2003
- 出版时间：April 22, 2003
- 年：2003
- 卷：15
- 期：8
- 页码：1587 - 1592
- 全文大小：139K
- 年卷期：v.15,no.8(April 22, 2003)
- ISSN：1520-5002
文摘
Doping of polyaniline with a new family of protonating agents, namely sulfosuccinateswith alkyl or alkoxy substituents, is discussed. The resulting polyaniline-sulfosuccinatesexhibit a lamellar type structural organization in which stacks of polymer chains areseparated by dopant anions. Although structurally similar to previously studied polyaniline-sulfophthalates, polyaniline-sulfosuccinates are better ordered and exhibit better physicalproperties. In particular, they exhibit metallic-type conductivity down to 210 K and theycan be stretched at room temperature to elongations at break, 
l/lo, approaching 200%.Mechanical stretching does not affect the temperature range of the metallic conductivity,however, it does induce a 4-fold increase in the room-temperature conductivity of the polymer.Low Tg of polyaniline-sulfosuccinates is also the origin of the low temperature thermochromism - a phenomenon reported so far only for polyaniline-sulfosuccinates andpolyaniline-sulfophthalates. Finally, accelerated aging tests carried out at a temperature of408 K, in ambient conditions, have shown that polyaniline doped with di-(2-butoxyethyl)ester of sulfosuccinic acid is thermally more stable than poly(3,4-ethylenedioxythiophene)doped with ferric tosylate (FeIII(Tos)3) - the system considered so far as the most stable ofall conducting polymers.
l/lo, approaching 200%.Mechanical stretching does not affect the temperature range of the metallic conductivity,however, it does induce a 4-fold increase in the room-temperature conductivity of the polymer.Low Tg of polyaniline-sulfosuccinates is also the origin of the low temperature thermochromism - a phenomenon reported so far only for polyaniline-sulfosuccinates andpolyaniline-sulfophthalates. Finally, accelerated aging tests carried out at a temperature of408 K, in ambient conditions, have shown that polyaniline doped with di-(2-butoxyethyl)ester of sulfosuccinic acid is thermally more stable than poly(3,4-ethylenedioxythiophene)doped with ferric tosylate (FeIII(Tos)3) - the system considered so far as the most stable ofall conducting polymers.