Yield stress of perchloric-acid-doped polythiophene/silicone oil suspensions

Datchanee Chotpattananont; Anuvat Sirivat; Alexander M. Jamieson

doi:10.1117/12.539699

27 July 2004 Yield stress of perchloric-acid-doped polythiophene/silicone oil suspensions

Datchanee Chotpattananont, Anuvat Sirivat, Alexander M. Jamieson

Proceedings Volume 5385, Smart Structures and Materials 2004: Electroactive Polymer Actuators and Devices (EAPAD); (2004) https://doi.org/10.1117/12.539699
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

Electrorheological properties in steady shear of perchloric acid doped poly(3-thiophene acetic acid), PTAA, particles in silicone oil were investigated to determine the effects of field strength, particle concentration, doping degree (conductivity values), operating temperature, and nonionic surfactant. The PTAA/silicone oil suspensions show the typical ER response of Bingham flow behavior upon the application of electric field. The yield stress increases with electric field strength, E, and particle volume fraction, f, according to a scaling law of the form, τ_y∝Ε^αΦ^γ. The scaling exponent a approaches the value of 2, predicted by the polarization model, as the particle volume fraction decreases and when the doping level of the particles decreases. The scaling exponent g tends to unity, as predicted by the polarization model, when the electric field strength is low. The yield stress under electric field initially increases with temperature up to 25 °C, and then levels off. At electric fields above of 1.5 kV/mm, the yield stress increases significantly by up to 50% on addition of small amounts of a nonionic surfactant.

Citation Download Citation

Datchanee Chotpattananont, Anuvat Sirivat, and Alexander M. Jamieson "Yield stress of perchloric-acid-doped polythiophene/silicone oil suspensions", Proc. SPIE 5385, Smart Structures and Materials 2004: Electroactive Polymer Actuators and Devices (EAPAD), (27 July 2004); https://doi.org/10.1117/12.539699

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Particles

Polarization

Doping

Silicon

Optical spheres

Polymers

Dielectric polarization

Show All Keywords

Keywords/Phrases

Search In:

Publication Years