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LEADER 03618nam 2200649Ia 4500

001 ocn227954489;

003 OCoLC;

005 20141212054345.0;

006 m d f ;

007 cr bn|||||||||;

008 080513s2001 mdua ob f000 0 eng d;

027 a| ARL-TR-2413;

029 0 a| DTICEb| ADA389182;

035 a| (Sirsi) o227954489;

035 a| (OCoLC)227954489;

040 a| DTICEc| DTICEd| GPOd| UtOrBLW;

049 a| ERE#;

074 a| 0324-A-01 (online);

086 0 a| D 101.133:2413;

100 1 a| MacKenzie, Stephen J.?| UNAUTHORIZED;

245 10 a| Material properties of bi-modal epoxy networks /c| Stephen J. MacKenzie, Thomas J. Mulkern, Nora C. Beck Tan.;

260 a| Aberdeen Proving Ground, MD :b| Army Research Laboratory,c| [2001];

300 a| 1 online resource (vi, 40 pages) :b| digital, PDF file.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| ARL/TR ;v| 2413;

500 a| Title from title screen (viewed Nov. 1, 2010).;

500 a| "March 2001.";

500 a| --Original contains color plates: All DTIC reproductions will be in black and white. Prepared in collaboration with University of Delaware.;

504 a| Includes bibliographical references (p. 31-32).;

506 a| APPROVED FOR PUBLIC RELEASE.;

520 a| The necessity for epoxies in new technologies is overwhelming. For these epoxies to perform at their maximum capabilities, both high strength and toughness must be in the list of mechanical properties. This is where bi-modal networks become important. Their combinations of both long- and short-chain cross linkers vary the cross-link density of the epoxy and thus improve the toughness. Here, a study was done to see if these bi-modal networks increase toughness without loss in modulus. Through the use of the differential scanning calorimeter to find the glass transition temperature, the dynamic mechanical analyzer to find the storage modulus, and the Izod impact machine to find the impact strength, we can make a conclusion whether these networks really work. In the beginning, the results seemed to be what we had hoped for, that is, the decrease in cross-link density did improve the impact strength; however, the storage modulus also decreased with a decrease in cross-link density. Finally, the conclusion can be stated that the bi-modal network does increase the toughness of this system but with a loss in modulus.;

650 0 a| Epoxy compounds.=| ^A333121;

650 17 a| Organic Chemistry.2| scgdst;

650 27 a| Mechanics.2| scgdst;

650 17 a| Strength(mechanics)2| dtict;

650 17 a| Crosslinking(chemistry)2| dtict;

650 17 a| Epoxy compounds.2| dtict;

650 27 a| Mechanical properties.2| dtict;

650 27 a| Toughness.2| dtict;

650 27 a| Impact strength.2| dtict;

650 27 a| Calorimeters.2| dtict;

650 27 a| Glass transition temperature.2| dtict;

653 2 a| BI-MODAL NETWORKS;

653 2 a| EPOXIES;

653 2 a| STORAGE MODULUS;

700 1 a| Mulkern, Thomas J.?| UNAUTHORIZED;

700 1 a| Beck Tan, Nora C.?| UNAUTHORIZED;

710 2 a| U.S. Army Research Laboratory.=| ^A367731;

830 0 a| ARL-TR (Aberdeen Proving Ground, Md.) ;v| 2413.=| ^A566074;

856 40 u| http://purl.fdlp.gov/GPO/gpo557;

949 a| Click on web addressw| ASISh| JOYNER94;

596 a| 1;

998 a| 2379723;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 2379723-1001l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 12/13/2010x| EDOCUMENTz| JERESOURCE;

Material properties of bi-modal epoxy networks / Stephen J. MacKenzie, Thomas J. Mulkern, Nora C. Beck Tan.

Author/creator	MacKenzie, Stephen J.
Other author	Mulkern, Thomas J.
Other author	Beck Tan, Nora C.
Other author	U.S. Army Research Laboratory.
Format	Electronic
Publication Info	Aberdeen Proving Ground, MD : Army Research Laboratory, [2001]
Description	1 online resource (vi, 40 pages) : digital, PDF file.
Supplemental Content	http://purl.fdlp.gov/GPO/gpo557
Subjects	Epoxy compounds.

Series	ARL/TR ; 2413 ARL-TR (Aberdeen Proving Ground, Md.) ; 2413. ^A566074
Abstract	The necessity for epoxies in new technologies is overwhelming. For these epoxies to perform at their maximum capabilities, both high strength and toughness must be in the list of mechanical properties. This is where bi-modal networks become important. Their combinations of both long- and short-chain cross linkers vary the cross-link density of the epoxy and thus improve the toughness. Here, a study was done to see if these bi-modal networks increase toughness without loss in modulus. Through the use of the differential scanning calorimeter to find the glass transition temperature, the dynamic mechanical analyzer to find the storage modulus, and the Izod impact machine to find the impact strength, we can make a conclusion whether these networks really work. In the beginning, the results seemed to be what we had hoped for, that is, the decrease in cross-link density did improve the impact strength; however, the storage modulus also decreased with a decrease in cross-link density. Finally, the conclusion can be stated that the bi-modal network does increase the toughness of this system but with a loss in modulus.
General note	Title from title screen (viewed Nov. 1, 2010).
General note	"March 2001."
General note	--Original contains color plates: All DTIC reproductions will be in black and white. Prepared in collaboration with University of Delaware.
Bibliography note	Includes bibliographical references (p. 31-32).
Access restriction	APPROVED FOR PUBLIC RELEASE.
Issued in other form	Paper version: MacKenzie, Stephen J. Material properties of bi-modal epoxy networks. vi, 40 p.
Technical rpt#	ARL-TR-2413
GPO item number	0324-A-01 (online)
Govt. docs number	D 101.133:2413

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Material properties of bi-modal epoxy networks / Stephen J. MacKenzie, Thomas J. Mulkern, Nora C. Beck Tan.

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