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Synthesis and Properties of Polymer ...

Stojak, Kristen L.

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Synthesis and Properties of Polymer Nanocomposites with Tunable Electromagnetic Response.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Synthesis and Properties of Polymer Nanocomposites with Tunable Electromagnetic Response./
作者:	Stojak, Kristen L.
面頁冊數:	90 p.
附註:	Source: Masters Abstracts International, Volume: 51-05.
Contained By:	Masters Abstracts International51-05(E).
標題:	Physics, Condensed Matter. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1535889
ISBN:	9781303030864

Synthesis and Properties of Polymer Nanocomposites with Tunable Electromagnetic Response.
Stojak, Kristen L.

Synthesis and Properties of Polymer Nanocomposites with Tunable Electromagnetic Response. - 90 p.

Source: Masters Abstracts International, Volume: 51-05.

Thesis (M.S.)--University of South Florida, 2013.

Multifunctional polymer nanocomposites (PNCs) are attractive for the design of tunable RF and microwave components such as flexible electronics, attenuators, and antennas due to cost-effectiveness and durability of polymeric matrices. In this work, three separate PNCs were synthesized. Magnetite (Fe 3O4) and cobalt ferrite (CFO) nanoparticles, synthesized by thermal decomposition, were used as PNC fillers. Polymers used in this work were a commercial polymer provided by the Rogers Corporation (RP) and polyvinylidene fluoride (PVDF). PNCs in this thesis consist of Fe3O 4 in RP, CFO in RP, and Fe3O4 in PVDF. Characterization techniques for determining morphology of the nanoparticles, and their resulting PNCs, include x-ray diffraction, transmission electron microscopy and magnetometry.

ISBN: 9781303030864Subjects--Topical Terms:

1018743
Physics, Condensed Matter.

Synthesis and Properties of Polymer Nanocomposites with Tunable Electromagnetic Response.
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245 1 0 $a Synthesis and Properties of Polymer Nanocomposites with Tunable Electromagnetic Response.
300 $a 90 p.
500 $a Source: Masters Abstracts International, Volume: 51-05.
500 $a Advisers: Hariharan Srikanth; Manh-Huong Phan.
502 $a Thesis (M.S.)--University of South Florida, 2013.
520 $a Multifunctional polymer nanocomposites (PNCs) are attractive for the design of tunable RF and microwave components such as flexible electronics, attenuators, and antennas due to cost-effectiveness and durability of polymeric matrices. In this work, three separate PNCs were synthesized. Magnetite (Fe 3O4) and cobalt ferrite (CFO) nanoparticles, synthesized by thermal decomposition, were used as PNC fillers. Polymers used in this work were a commercial polymer provided by the Rogers Corporation (RP) and polyvinylidene fluoride (PVDF). PNCs in this thesis consist of Fe3O 4 in RP, CFO in RP, and Fe3O4 in PVDF. Characterization techniques for determining morphology of the nanoparticles, and their resulting PNCs, include x-ray diffraction, transmission electron microscopy and magnetometry.
520 $a All magnetometry measurements were taken using a Quantum Design Physical Property Measurement System with a superconducting magnet. Temperature and external magnetic field magnetization measurements revealed that all samples exhibit superparamagnetic behavior at room temperature. Blocking temperature, coercivity and reduced remnant magnetization do not vary with concentration. Tunable saturation magnetization, based on nanoparticle loading, was observed across all PNCs, regardless of polymer or nanoparticle choice, indicating that this is an inherent property in all similar PNC materials.
520 $a Tunability studies of the magneto-dielectric PNCs were carried out by adding the PNC to cavity and microstrip linear resonator devices, and passing frequencies of 1--6 GHz through them in the presence of transverse external magnetic fields of up to 4.5 kOe, provided by an electromagnet. Microwave characteristics were extracted from scattering parameters of the PNCs. In all cases, losses were reduced, quality factor was increased, and tunability of the resonance frequency was demonstrated. Strong magnetic field dependence was observed across all samples measured in this study.
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