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Proceedings Paper

Molecular weight dependence of the physical properties of protonated polyaniline films and fibers
Author(s): Phillip N. Adams; Danielle Bowman; Lori Brown; Dali Yang; Benjamin R. Mattes
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Paper Abstract

Polyaniline, (PANI) in the form of emeraldine base, was synthesized by polymerizing aniline in acid solutions at different sub-zero temperatures to give a range of molecular weights between 100,000 and 300,000 gmol-1. Molecular weights were measured using gel permeation chromatography (GPC). The polymers were formed into solvent-cast films using an acid processing technique, involving 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA) as the solvating/protonating acid group and dichloroacetic acid (DCA) plus formic acid (FA) as the solvent. The dried, free-standing films were stretched by drawing over a hot pin to align the polymer chains. Fibers were prepared by spinning more concentrated solutions into a butanone coagulation bath. Conductivity measurements were then made on the drawn films and fibers, and tensile test measurements performed to determine the peak stress and modulus of the drawn films and fibers. The reaction conditions under which the different polyanilines were synthesized, and their molecular weight, were found to have a definite effect upon both the electrical and mechanical properties of the drawn films and fibers. The drawn films and fibers can be used as mechanical actuators.

Paper Details

Date Published: 16 July 2001
PDF: 7 pages
Proc. SPIE 4329, Smart Structures and Materials 2001: Electroactive Polymer Actuators and Devices, (16 July 2001); doi: 10.1117/12.432679
Show Author Affiliations
Phillip N. Adams, Santa Fe Science and Technology, Inc. (United States)
Danielle Bowman, Santa Fe Science and Technology, Inc. (United States)
Lori Brown, Santa Fe Science and Technology, Inc. (United States)
Dali Yang, Santa Fe Science and Technology, Inc. (United States)
Benjamin R. Mattes, Santa Fe Science and Technology, Inc. (United States)


Published in SPIE Proceedings Vol. 4329:
Smart Structures and Materials 2001: Electroactive Polymer Actuators and Devices
Yoseph Bar-Cohen, Editor(s)

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