Thesis (M.Sc.)--Memorial University of Newfoundland, 1992. / Typescript. Bibliography: leaves 140-157. Also available online.

Thesis (Ph.D.)--Memorial University of Newfoundland, 1994. / Typescript. Bibliography: leaves 352-370. Also available online.

Thesis (Ph. D.)--Carleton University, 1996. / Also available in electronic format on the Internet.

Thesis (Ph. D.)--University of Hong Kong, 2005.

Thesis (Ph. D.)--University of Florida, 1982. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 72-74).

Orientador: Nilson Cristino da Cruz / Banca: Munemasa Machida / Banca: Walter Ruggeri Waldman / O Programa de Pós-Graduação em Ciência e Tecnologia de Materiais, PosMat, tem caráter institucional e integra as atividades de pesquisa em materiais de diversos campi da Unesp / Resumo: Neste trabalho foi desenvolvido um equipamento para produção de plasmas em pressão atmosférica. Empregando esse sistema, o polímero PLDLA (poli(L-Co,L ácido lático)) e sua blenda com o tri(carbonato de metileno) (poli(L-Co-D,L-Co TMC)) foram hidrofilizados em diferentes condições de tempo e potência de plasma. Seus ângulos de contato foram investigados anteriormente e após cada exposição ao plasma para se avaliar o efeito do tratamento. Espectroscopia de emissão óptica foi empregada para se caracterizar o plasma. A exposição por 10 segundos a um plasma excitado com 100 W, reduziu os ângulos de contato do PLDLA em 32,5% e da blenda PLDLA/TMC em 87%. No final do trabalho, apenas para ilustrar a capacidade de modificação de superfícies, diversas materiais como cobre, policloreto de vinila (PVC) acrílico, entre outros, foram tratados e seus ângulos de contato analisados / Abstract: In this work, an equipment to produce atmospheric pressure plasma was developed. With this system, polymer PLDLA (poli(L-Co-D, L latic acid)) and its blend with trimethylene carbonate (poli(L-Co_D,L-Co TMC) were hydrophilizated in different time conditions and plasma power. The contact angle were investigated before and after the plasma exposure to evaluate the treatment effect. Optical emission spectroscopy was used to characterize the plasma. Exposure for 10 seconds to a plasma excited with 100 W, reduced contact angles of PLDLA in 32,5% and the blend PLDLA/TMC at 87%. At the end of this work, just to illustrate the capacity of surface modification different kinds of materials as capper, Polyvinyl chloride (PVC), acrylic, and others, were treated and its contact angle were analyzed / Mestre

Made available in DSpace on 2014-06-11T19:30:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-01-22Bitstream added on 2014-06-13T20:40:14Z : No. of bitstreams: 1 lopes_bb_me_bauru.pdf: 1573590 bytes, checksum: 90b878237fc0d7d1c3c8916c81516aa3 (MD5) / Neste trabalho foi desenvolvido um equipamento para produção de plasmas em pressão atmosférica. Empregando esse sistema, o polímero PLDLA (poli(L-Co,L ácido lático)) e sua blenda com o tri(carbonato de metileno) (poli(L-Co-D,L-Co TMC)) foram hidrofilizados em diferentes condições de tempo e potência de plasma. Seus ângulos de contato foram investigados anteriormente e após cada exposição ao plasma para se avaliar o efeito do tratamento. Espectroscopia de emissão óptica foi empregada para se caracterizar o plasma. A exposição por 10 segundos a um plasma excitado com 100 W, reduziu os ângulos de contato do PLDLA em 32,5% e da blenda PLDLA/TMC em 87%. No final do trabalho, apenas para ilustrar a capacidade de modificação de superfícies, diversas materiais como cobre, policloreto de vinila (PVC) acrílico, entre outros, foram tratados e seus ângulos de contato analisados / In this work, an equipment to produce atmospheric pressure plasma was developed. With this system, polymer PLDLA (poli(L-Co-D, L latic acid)) and its blend with trimethylene carbonate (poli(L-Co_D,L-Co TMC) were hydrophilizated in different time conditions and plasma power. The contact angle were investigated before and after the plasma exposure to evaluate the treatment effect. Optical emission spectroscopy was used to characterize the plasma. Exposure for 10 seconds to a plasma excited with 100 W, reduced contact angles of PLDLA in 32,5% and the blend PLDLA/TMC at 87%. At the end of this work, just to illustrate the capacity of surface modification different kinds of materials as capper, Polyvinyl chloride (PVC), acrylic, and others, were treated and its contact angle were analyzed

The Z-pinches in a vacuum spark can be classified into slow, fast and superfast according to their pinch durations. Their emission characteristics are investigated in the visible, ultraviolet and the X-ray wavelengths. The plasma during a fast pinch was found to have an electron temperature between 100 and 600eV. The superfast pinch resulted in a minute cylindrical plasma approximately 40 μm in diameter, with an electron temperature of 1 to 4keV and a lifetime of less than 4ns. The slow and the fast pinch were found to be in agreement with the theoretical results predicted by a shock wave model. The formation of the superfast pinch and its associated high density and temperature were explained as the results of magnetohydrodynamic instability. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

The range of plasma spectroscopy tends to increase with the introduction of more efficient plasma excitation sources. In this thesis the use of one such plasma excitation source, the microwave induced plasma is evaluated as an atom cell for atomic spectrometry. The modes of spectrometry evaluated are atomic emission and atomic fluoresence. Analytical merits of the microwave induced plasma using detection limits and studies of interelement effects (i.e. vaporization, ionizationâ and scatter interferences) are also presented. / Master of Science

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