Masters Theses
Keywords and Phrases
Acoustic sensing; Microphone packaging
Abstract
"Polyaniline, an inherently conducting polymer, was synthesized and fabricated as an acoustic membrane enclosure for the packaging of a MEMS-based acoustic microsensor. The package design should minimize environmental ambient impact including dust and excess moisture and maximize microphone performance. Freestanding films of the emeraldine base form of polyaniline were doped with aluminum acetoacetonate, iron acetoacetonate, copper acetoacetonate and titanium ethoxide. Polymer-metal hybrid compositions were analyzed by scanning electron microscopy (SEM) and deconvoluting X-ray photoelectron spectra (XPS) to discern interactions between metal atoms and polyaniline. Mechanical properties of the material, specifically the glass transition temperature and elastic and imaginary moduli, were measured by dynamic mechanical analysis (DMA) as a function of metal type, mechanical excitation frequency and temperature. The hybrid materials were then formed and shaped as flat membranes or as shaped domes of variable radii of curvature, including hemispherical. Acoustic transmission properties of metal-doped planar and dome-shaped membranes were measured by insertion loss as a function of acoustic frequency between 100 to 2000 Hz in a plane wave tube. Results indicated that the type of metal incorporated into polyaniline effected properties. Increases in mechanical stiffness and the acoustic resonance frequency were observed with increasing metal-polymer interaction"--Abstract, page iv.
Advisor(s)
Schuman, Thomas P.
Committee Member(s)
O'Keefe, Matthew
Chusuei, Charles C.
Department(s)
Chemistry
Degree Name
M.S. in Chemistry
Publisher
University of Missouri--Rolla
Publication Date
Summer 2003
Journal article titles appearing in thesis/dissertation
- Chemical characterization of polymer/metal hybrid enclosures
- Acoustic characterization of metal/polymer membrane enclosures
Pagination
xi, 66 pages
Note about bibliography
Includes bibliographical references.
Rights
© 2003 Ayse Beyaz, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Thesis Number
T 8325
Print OCLC #
54901532
Recommended Citation
Beyaz, Ayse, "Polymer-metal interactions" (2003). Masters Theses. 2405.
https://scholarsmine.mst.edu/masters_theses/2405
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Comments
Funding for the project was provided by the Defense Advanced Research Projects Agency (DARPA) through the Army Research Laboratory (DAAD-19-00-1-0176) under project managers Dr. Edgar Martinez (DARPA) and Dr. Nassy Srour (ARL).