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00000cam a2200000Ka 4500 |
| 001 |
in00002575395 |
| 005 |
20151201150138.0 |
| 006 |
m f d |
| 007 |
cr unu|||||||| |
| 008 |
100428s2010 txu sbm 000 0 eng d |
| 035 |
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|a (OCoLC)ocn609886209
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| 035 |
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|a (OCoLC)609886209
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| 035 |
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|a (TxCM)http://hdl.handle.net/1969.1/ETD-TAMU-1566
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| 040 |
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|a TXA
|c TXA
|d UtOrBLW
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| 049 |
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|a TXAM
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| 099 |
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|a 2007
|a Thesis
|a 1969.1/ETD-TAMU-1566
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| 100 |
1 |
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|a Miriyala, Sethu M.
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| 245 |
1 |
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|a Effect of composite microstructure on electrical and mechanical properties of poly(vinyl acetate) composites with carbon black and clay /
|c by Sethu M. Miriyala.
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| 264 |
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1 |
|a [College Station, Tex.] :
|b [Texas A&M University],
|c [2010]
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| 300 |
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|a 1 online resource.
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| 336 |
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|a text
|b txt
|2 rdacontent
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| 337 |
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|a computer
|b c
|2 rdamedia
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| 338 |
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|a online resource
|b cr
|2 rdacarrier
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| 500 |
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|a "Major Subject: Mechanical Engineering"
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| 500 |
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|a Title from author supplied metadata (automated record created 2010-03-12 12:08:51).
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| 502 |
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|b Master of Science
|c Texas A&M University
|d 2007
|o http://hdl.handle.net/1969.1/ETD-TAMU-1566
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| 504 |
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|a Includes bibliographical references.
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| 516 |
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|a Text (Thesis)
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|a The electrical and mechanical behavior of carbon black filled poly(vinyl acetate) latex-based and solution-based polymer composites was examined. A set of experiments were performed to distinguish composites with a segregated network (emulsion-based) from those with random dispersion (solution-based) of the filler. The percolation thresholds for the emulsion-based composites were near 1.2 vol% carbon black, while the solution-based composites were around 8.2 vol% carbon black. This difference is due to the segregated network formation, which leads to excluded volume effects in emulsion-based systems. This excluded volume created by the solid polymer particles forces the carbon black particles into conductive pathways at low concentration. In the solution-based case, fully solvated polymer results in a random dispersion of carbon black. The segregated network composite also shows significant improvement in both electrical conductivity and storage modulus with low carbon black loading, while the solution-based composite achieves significant property enhancements at higher carbon black loading because of the greater percolation threshold. The effect of clay in both emulsion and solution-based composites with carbon black was also studied by preparing composites with three clay concentrations (0.2, 0.4 and 2 wt%). In emulsion-based composites, low clay concentration reduced the percolation threshold from 1.2 vol% to 0.8 vol% carbon black, but with solution-based composites clay increased the percolation threshold from 8.2 vol% to 11.7 vol% carbon black. It is assumed that clay helps to force the carbon black particles into the conductive pathways in the emulsion-based composites. In solution-base composites, clay improves the dispersion of carbon black, thereby destroying the carbon black network and reducing conductivity and storage modulus. The storage modulus in emulsion-based composites improved with 0.2 wt% clay but greater clay concentration resulted in a drop in modulus due to porosity from excess excluded volume effects.
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| 500 |
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|a Electronic resource.
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| 650 |
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|a Major mechanical engineering.
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| 653 |
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|a composites
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| 700 |
1 |
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|a Grunlan, Jaime C.,
|e thesis advisor.
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| 856 |
4 |
0 |
|u http://hdl.handle.net/1969.1/ETD-TAMU-1566
|z Link to OAK Trust copy
|t 0
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| 948 |
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|a cataloged
|b h
|c 2010/4/28
|d c
|e jgreene
|f 12:28:25 pm
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| 994 |
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|a C0
|b TXA
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| 999 |
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|a MARS
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| 999 |
f |
f |
|s 9b2e16c4-22d8-3db5-a58d-e89f446ef20f
|i 868ca234-f03c-37ca-bdff-e9c7ebc63e3c
|t 0
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| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|d Available Online
|t 0
|e 2007 Thesis 1969.1/ETD-TAMU-1566
|h Other scheme
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| 998 |
f |
f |
|a 2007 Thesis 1969.1/ETD-TAMU-1566
|t 0
|l Available Online
|