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Nanomechanics and the viscoelastic b...

Fisher, Frank Thomas.

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Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers./
作者:	Fisher, Frank Thomas.
面頁冊數:	226 p.
附註:	Adviser: L. Catherine Brinson.
Contained By:	Dissertation Abstracts International63-11B.
標題:	Engineering, Materials Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3071639
ISBN:	0493915893

Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.
Fisher, Frank Thomas.

Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers. - 226 p.

Adviser: L. Catherine Brinson.

Thesis (Ph.D.)--Northwestern University, 2002.

Recent experimental results demonstrate that substantial improvements in the mechanical behavior of polymers can be attained using small amounts of carbon nanotubes as a reinforcing phase. While this suggests the potential use of carbon nanotube-reinforced polymers (NRPs) for structural applications, the development of predictive models describing NRP effective behavior will be critical in the development and ultimate employment of such materials. To date many researchers have simply studied the nanoscale behavior of NRPs using techniques developed for traditional composite materials. While such studies can be useful, this dissertation seeks to extend these traditional theories to more accurately model the nanoscale interaction of the NRP constituent phases.

ISBN: 0493915893Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.
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245 1 0 $a Nanomechanics and the viscoelastic behavior of carbon nanotube-reinforced polymers.
300 $a 226 p.
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500 $a Source: Dissertation Abstracts International, Volume: 63-11, Section: B, page: 5474.
502 $a Thesis (Ph.D.)--Northwestern University, 2002.
520 $a Recent experimental results demonstrate that substantial improvements in the mechanical behavior of polymers can be attained using small amounts of carbon nanotubes as a reinforcing phase. While this suggests the potential use of carbon nanotube-reinforced polymers (NRPs) for structural applications, the development of predictive models describing NRP effective behavior will be critical in the development and ultimate employment of such materials. To date many researchers have simply studied the nanoscale behavior of NRPs using techniques developed for traditional composite materials. While such studies can be useful, this dissertation seeks to extend these traditional theories to more accurately model the nanoscale interaction of the NRP constituent phases.
520 $a Motivated by micrographs showing that embedded nanotubes often exhibit significant curvature within the polymer, in the first section of this dissertation a hybrid finite element-micromechanical model is developed to incorporate nanotube waviness into micromechanical predictions of NRP effective modulus. While also suitable for other types of wavy inclusions, results from this model indicate that moderate nanotube waviness can dramatically decrease the effective modulus of these materials.
520 $a The second portion of this dissertation investigates the impact of the nanotubes on the overall NRP viscoelastic behavior. Because the nanotubes are on the size scale of the individual polymer chains, nanotubes may alter the viscoelastic response of the NRP in comparison to that of the pure polymer; this behavior is distinctly different from that seen in traditional polymer matrix composites. Dynamic mechanical analysis (DMA) results for each of three modes of viscoelastic behavior (glass transition temperature, relaxation spectrum, and physical aging) are all consistent with the hypothesis of a reduced mobility, non-bulk polymer phase in the vicinity of the embedded nanotubes.
520 $a These models represent initial efforts to incorporate nanoscale phenomena into predictive models of NRP mechanical behavior. As these results may identify areas where more detailed atomic-scale computational models (such as <italic> ab initio</italic> or molecular dynamics) are warranted, they will be beneficial in the modeling and development of these materials. These models will also aid the interpretation of NRP experimental data.
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