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001 ocm74259754;

003 OCoLC;

005 20141212053303.0;

006 m d f ;

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

008 080513s2003 vaua ob f000 0 eng d;

029 0 a| DTICEb| ADA420032;

035 a| (Sirsi) o74259754;

035 a| (OCoLC)74259754;

040 a| DTICEc| DTICEd| GPOd| UtOrBLW;

049 a| ERE#;

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

086 0 a| D 101.133:3109;

100 1 a| Jensen, Robert E.=| ^A196938;

245 10 a| Viscoelastic properties of alkoxy silane-epoxy interpenetrating networks /c| by Robert E. Jensen, Steven H. McKnight, and Giuseppe R. Palmese.;

260 a| Aberdeen Proving Ground, Md. :b| Army Research Laboratory,c| [2003];

300 a| 1 online resource (vi, 32 pages) :b| digital, PDF file.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| ARL-TR ;v| 3109;

500 a| Title from title screen (viewed Sept. 8, 2010).;

500 a| The original document contains color images. All DTIC reproductions will be in black and white.;

500 a| "November 2003.";

504 a| Includes bibliographical references (p. 24-26).;

506 a| APPROVED FOR PUBLIC RELEASE.;

520 a| A model epoxy-silane interpenetrating network (IPN) was synthesized to simulate the molecular structure found at the fiber-matrix interphase. The Young's modulus (E) of the epoxy-silane IPN was determined% trough micromechanical analysis both quasi-statically and in the frequency domain. The epoxy-silane IPN was synthesized by diffusion of uncured diglycidyl ether of bisphenol A (DGEBA) epoxy resin and bis (p-aminocyclohexyl) methane (PACM) curing agent into spherical particles of condensed and crosslinked 3-glycidoxypropyltrimethoxysilane (GPS). This IPN composition was chosen to simulate the typical properties of a silane modified interphase found in glass reinforced composites. Differential scanning calorimetry showed that the glass transition temperature (Tg) of the initial crosslinked siloxane network increased upon cure of the DGEBA and PACM, but was still significantly lower than that of the neat epoxy matrix. Additionally, dynamic mechanical analysis was used in conjunction with the micromechanical C-Combining Rule to show that the Young's modulus of the epoxy-silane IPN spherical inclusions (E sub i) was decreased in comparison to the Young's modulus of the matrix epoxy (E sub m) at all temperatures. The time-temperature superposition (tTsp) principle was successfully applied to the epoxy-silane IPN to determine viscoelastic properties at high frequencies. The viscoelastic properties of the epoxy-silane IPN may have implications with respect to the ballistic impact resistance of composite structures used for U.S. Army applications.;

650 0 a| Alkoxysilanes.=| ^A1022696;

650 0 a| Penetration mechanics.=| ^A650622;

650 0 a| Viscoelasticity.=| ^A25008;

650 17 a| Laminates and Composite Materials.2| scgdst;

650 17 a| Viscoelasticity.2| dtict;

650 17 a| Epoxy composites.2| dtict;

650 27 a| High frequency.2| dtict;

650 27 a| Adhesion.2| dtict;

650 27 a| Modulus of elasticity.2| dtict;

650 27 a| Composite structures.2| dtict;

650 27 a| Matrix materials.2| dtict;

650 27 a| Phase studies.2| dtict;

650 27 a| Siloxanes.2| dtict;

650 27 a| Impact strength.2| dtict;

650 27 a| Amines.2| dtict;

650 27 a| Crosslinking(chemistry)2| dtict;

650 27 a| Silanes.2| dtict;

650 27 a| Molecular structure.2| dtict;

650 27 a| Methane.2| dtict;

650 27 a| Glycidyl ether.2| dtict;

650 27 a| Curing agents.2| dtict;

650 27 a| Frequency domain.2| dtict;

650 27 a| Reinforcing materials.2| dtict;

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

650 27 a| Differential scanning calorimetry.2| dtict;

653 1 a| IPN(INTERPENETRATING NETWORK);

653 2 a| DGEBA(DIGLYCIDYL ETHER OF BISPHENOL A);

653 2 a| PACM(P-AMINOCYCLOHEXYL-METHANE);

653 2 a| GPS(3-GLYCIDOCYPROPYLTRIMETHOXYSILANE);

653 1 a| ALKOXY SILANE;

700 1 a| McKnight, Steven H.=| ^A1023474;

700 1 a| Palmese, Giuseppe R.=| ^A1023473;

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

830 0 a| ARL-TR (Aberdeen Proving Ground, Md.) ;v| 3109.=| ^A566074;

856 40 u| https://purl.fdlp.gov/GPO/LPS126010;

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

998 a| 2321135;

998 a| u2321135;

596 a| 1;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 2321135-1001l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 10/18/2010x| EDOCUMENTz| JERESOURCE;

Viscoelastic properties of alkoxy silane-epoxy interpenetrating networks / by Robert E. Jensen, Steven H. McKnight, and Giuseppe R. Palmese.

Author/creator	Jensen, Robert E.
Other author	McKnight, Steven H.
Other author	Palmese, Giuseppe R.
Other author	U.S. Army Research Laboratory.
Format	Electronic
Publication Info	Aberdeen Proving Ground, Md. : Army Research Laboratory, [2003]
Description	1 online resource (vi, 32 pages) : digital, PDF file.
Supplemental Content	https://purl.fdlp.gov/GPO/LPS126010
Subjects	Alkoxysilanes. Penetration mechanics. Viscoelasticity.

Series	ARL-TR ; 3109 ARL-TR (Aberdeen Proving Ground, Md.) ; 3109. ^A566074
Abstract	A model epoxy-silane interpenetrating network (IPN) was synthesized to simulate the molecular structure found at the fiber-matrix interphase. The Young's modulus (E) of the epoxy-silane IPN was determined% trough micromechanical analysis both quasi-statically and in the frequency domain. The epoxy-silane IPN was synthesized by diffusion of uncured diglycidyl ether of bisphenol A (DGEBA) epoxy resin and bis (p-aminocyclohexyl) methane (PACM) curing agent into spherical particles of condensed and crosslinked 3-glycidoxypropyltrimethoxysilane (GPS). This IPN composition was chosen to simulate the typical properties of a silane modified interphase found in glass reinforced composites. Differential scanning calorimetry showed that the glass transition temperature (Tg) of the initial crosslinked siloxane network increased upon cure of the DGEBA and PACM, but was still significantly lower than that of the neat epoxy matrix. Additionally, dynamic mechanical analysis was used in conjunction with the micromechanical C-Combining Rule to show that the Young's modulus of the epoxy-silane IPN spherical inclusions (E sub i) was decreased in comparison to the Young's modulus of the matrix epoxy (E sub m) at all temperatures. The time-temperature superposition (tTsp) principle was successfully applied to the epoxy-silane IPN to determine viscoelastic properties at high frequencies. The viscoelastic properties of the epoxy-silane IPN may have implications with respect to the ballistic impact resistance of composite structures used for U.S. Army applications.
General note	Title from title screen (viewed Sept. 8, 2010).
General note	The original document contains color images. All DTIC reproductions will be in black and white.
General note	"November 2003."
Bibliography note	Includes bibliographical references (p. 24-26).
Access restriction	APPROVED FOR PUBLIC RELEASE.
Issued in other form	Paper version: Jensen, Robert E. Viscoelastic properties of alkoxy silane-epoxy interpenetrating networks. vi, 32 p.
GPO item number	0324-A-01 (online)
Govt. docs number	D 101.133:3109

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Viscoelastic properties of alkoxy silane-epoxy interpenetrating networks / by Robert E. Jensen, Steven H. McKnight, and Giuseppe R. Palmese.

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