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Friction and wear properties of PET ...

Bhimaraj, Praveen.

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Friction and wear properties of PET nanocomposites: The role of matrix morphology, nanoparticles and interface.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Friction and wear properties of PET nanocomposites: The role of matrix morphology, nanoparticles and interface./
Author:	Bhimaraj, Praveen.
Description:	152 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-07, Section: B, page: 3645.
Contained By:	Dissertation Abstracts International65-07B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3140934
ISBN:	049688073X

Friction and wear properties of PET nanocomposites: The role of matrix morphology, nanoparticles and interface.
Bhimaraj, Praveen.

Friction and wear properties of PET nanocomposites: The role of matrix morphology, nanoparticles and interface. - 152 p.

Source: Dissertation Abstracts International, Volume: 65-07, Section: B, page: 3645.

Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2004.

Tribology of nanoparticle filled polymer systems is of significant interest for the unique behavior that can be obtained. Incorporation of nanofillers has been shown to lead to composites with combined properties of high wear resistance at low loadings as well as reduced friction. The tribology of semi-crystalline polymers is closely connected to the spherulitic and crystalline morphology and as the morphology changes on addition of nanofilers, the tribology can also be expected to change.

ISBN: 049688073XSubjects--Topical Terms:

1017759
Engineering, Materials Science.

Friction and wear properties of PET nanocomposites: The role of matrix morphology, nanoparticles and interface.
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020 $a 049688073X
035 $a (UnM)AAI3140934
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040 $a UnM $c UnM
100 1 $a Bhimaraj, Praveen. $3 1938784
245 1 0 $a Friction and wear properties of PET nanocomposites: The role of matrix morphology, nanoparticles and interface.
300 $a 152 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-07, Section: B, page: 3645.
500 $a Advisers: Linda S. Schadler; Richard W. Siegel.
502 $a Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2004.
520 $a Tribology of nanoparticle filled polymer systems is of significant interest for the unique behavior that can be obtained. Incorporation of nanofillers has been shown to lead to composites with combined properties of high wear resistance at low loadings as well as reduced friction. The tribology of semi-crystalline polymers is closely connected to the spherulitic and crystalline morphology and as the morphology changes on addition of nanofilers, the tribology can also be expected to change.
520 $a In this study, we report the tribological behavior of composites of poly(ethylene) terephthalate (PET) with nanosize Al2O3. Results show that the addition of nanofillers to samples prepared under the same processing conditions increases the wear resistance by as much as 45%. Simultaneously, the coefficient of friction decreases by 24%. Beyond a certain filler content, both properties increased. The addition of nanoparticles changes the crystallization behavior, crystallinity, spherulitic morphology and the supramolecular structure of PET. The decrease in coefficient of friction is attributed to a decrease in crystallinity. The inherent nature of the nanoparticles, however, is to increase the coefficient of friction of the composite. When samples of same crystallinity, but with varying filler content were tested, the coefficient of friction of the nanocomposites was higher than the unfilled polymer. However, the wear rate initially decreased with addition of nanoparticles and then increased beyond an optimum filler content. The decrease in wear rate is attributed to improved adhesion of the transfer film to the counterface with higher filler contents. With increasing nanoparticles loading, there is also an increased tendency of the nanoparticles to agglomerate in the transfer film due to shear as a result of the proximity of the particles. The presence of an optimum filler content is due to competition between increased adhesion of the transfer film and a higher tendency to form abrasive aggregates with increasing filler content.
520 $a A procedure was developed for establishing a strong interface between the nanoparticles and the PET matrix. However, the composites with strong interface did not show significantly better properties than composites with weaker interface.
590 $a School code: 0185.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Plastics Technology. $3 1023683
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690 $a 0548
690 $a 0795
710 2 0 $a Rensselaer Polytechnic Institute. $3 1019062
773 0 $t Dissertation Abstracts International $g 65-07B.
790 1 0 $a Schadler, Linda S., $e advisor
790 1 0 $a Siegel, Richard W., $e advisor
790 $a 0185
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3140934