Staff View
Processing, characteristics and properties of CNT-enhanced PA 66.

Descriptive

TitleInfo
Title
Processing, characteristics and properties of CNT-enhanced PA 66.
Name (type = personal)
NamePart (type = family)
Whieb
NamePart (type = given)
Nofel Zuhier
NamePart (type = date)
1983-
DisplayForm
Nofel Zuhier Whieb
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Kear
NamePart (type = given)
Bernard Henry
DisplayForm
Bernard Henry Kear
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
School of Graduate Studies
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2017
DateOther (qualifier = exact); (type = degree)
2017-10
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2017
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
In this research, structure-properties-processing relationships of melt-processed CNT-PA 66 composites are investigated. Using a novel high-shear mixing device, efficient dispersal of CNTs in molten PA 66 is achieved, forming a well-bonded composite that displays enhanced mechanical properties. Post-fabrication heat treatment of some graphite-polymer composites also changes properties in new and unexpected ways. Observations by SEM and TEM indicate good bonding between CNTs and PA 66. DSC measurements show a second crystallization peak in the cooling curve, as the CNT content in PA 66 matrix increases from 1 to 5 wt. %. This new type of crystallization becomes a dominant feature in the range of 6-8 wt. % CNTs. Such interactions correlate with changes in elastic modulus and impact strength. FTIR analysis shows a steady increase in peak intensities for 1-5 wt. % CNT-PA 66 composites, until at 6 wt. % there is a sudden decrease in Amide I and II stretching peak intensities, accompanied by a shift to lower wave numbers. This behavior may be attributed to transformation of the original matrix structure to a new C-C rich bonded crystalline state. Three-point bend tests show a decrease in elastic modulus up to 3 wt. % CNTs in PA 66 due to minor degradation of the polymer matrix. At higher CNT concentrations, covalent bonding between fractured-ends of CNTs and polymer matrix occurs, which increases elastic modulus via a load transfer mechanism. At even higher CNT concentrations, a bridging effect occurs between adjacent covalently-bonded regions that increases impact strength. Eventually this results in a fully cross-linked structure of high stiffness and low impact resistance. As might be expected, peak stress at fracture shows an inverse relationship with stiffness. A two-step heat treatment is used to modify the structure and properties of 35 wt. % graphite-PEEK composite. It involves heating the composite at 200°C for 20 hours and then at 380°C for 18 hours. Examination of samples by TEM and XPS showed some polymer has gasified and the remaining polymer is a well-crystallized PEEK. 35 wt. % graphite-PA 66 composite was heat treated at 280°C for 24 and 48 hours. A new highly crystalline phase led to increase in elastic modulus was investigated by DSC and FTIR. This opens new opportunities to enhance properties and performance of injection-molded components or parts.
Subject (authority = RUETD)
Topic
Materials Science and Engineering
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_8218
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xviii, 116 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Nofel Zuhier Whieb
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T30K2CQP
Genre (authority = ExL-Esploro)
ETD doctoral
Back to the top

Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Whieb
GivenName
Nofel
MiddleName
Zuhier
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-05-24 19:15:48
AssociatedEntity
Name
Nofel Whieb
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
RightsEvent
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-10-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2018-05-02
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after May 2nd, 2018.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
Back to the top

Technical

RULTechMD (ID = TECHNICAL1)
ContentModel
ETD
OperatingSystem (VERSION = 5.1)
windows xp
CreatingApplication
Version
1.7
ApplicationName
PDFelement 6
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2017-05-25T14:58:50
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
D:2017052514
Back to the top
Version 8.4.8
Rutgers University Libraries - Copyright ©2022