Thesis (Ph.D.)--Drexel University, 2010. / Includes abstract and vita. Includes bibliographical references (leaves 151-159).

Reprints of 3 articles published by the author included in back of book / 1v. (various paging) : ill. ; 26 cm / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.1974) from the Dept. of Physical and Inorganic Chemistry, University of Adelaide

Thesis (Ph.D. 1974) from the Dept. of Physical and Inorganic Chemistry, University of Adelaide. / Reprints of 3 articles published by the author included in back of book.

Thesis (M.E.)--University of Waikato, 2008. / Title from PDF cover (viewed August 26, 2008) Includes bibliographical references (p. 92-96)

Thesis (Ph. D.)--University of Wisconsin--Madison, 1983. / Typescript. Vita. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Doped electrically conductive polymers are one of the critical materials that have allowed the current technological revolution. Essentially all of today's applications of doped conductive polymers involve vinyl-related polymers. While the application of conductive polymers is rapidly increasing, there is need for additional materials with different electrical behaviors. The current focus is on studying condensation polymers that contain a metal atom and the possibility of undergoing entire chain delocalization of electrons. The different series of organometallic condensation polymers were synthesized by employing interfacial polycondensation technique and characterization of these products were carried out using standard techniques like light scattering photometer, fourier transform infrared spectroscopy (FTIR), matrix assisted laser desorption ionization time of flight mass spectroscopy (MALDI TOF MS) and nuclear magnetic resonance spectroscopy (NMR). The electrical measurements were carried out employing Genrad 1650-B impedance spectroscopy. Prior studies conducted in this area have led to the pathway of looking at two aspects; first, surveying 60 metal-containing polymers that can undergo entire chain delocalization studying the effect of different substituents on their electrical properties and secondly, doping selected candidates employing iodine. The products derived from 2-nitro-1,4-phenylenediamine and N-methyl-1,4- pheneylenediamines with titanocene dichloride exhibited about 10 3 to 10 5 fold magnitude increases in the electrical conductivity on doping with iodine, moving it near conductive region. This increase is dependent on the concentration of the iodine and is cyclic. The results support the starting premise that selected metal-containing condensation polymers can be doped to increase their electrical conductivity. / Further investigation is warranted to see if metal-containing condensation polymers can be important materials in the electronic industry. This research sets the stage for studying not only metal-containing polymeric materials but also to investigate the ability to increase the conductivity of other condensation polymers such as nylons and polyesters through doping. / by Amitabh J. Battin. / Thesis (Ph.D.)--Florida Atlantic University, 2009. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2009. Mode of access: World Wide Web.

Orientador: Rubens Maciel Filho / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química / Made available in DSpace on 2018-08-25T09:22:08Z (GMT). No. of bitstreams: 1 Oliveira_HerbertPereirade_D.pdf: 4267666 bytes, checksum: ab495e80bdcc1edbfd0e338de9888c01 (MD5) Previous issue date: 2013 / Resumo: Este trabalho teve como objetivo principal a proposta de projeto de uma planta piloto de polimerização Nylon 6 para o desenvolvimento de novas aplicações. O processo adotado é a polimerização hidrolítica do Nylon 6, a partir do monômero ?-caprolactama, que compreende a vaporização de ambos, monômero e água, em um reator de bancada operado no regime de batelada. O Nylon 6 vem sendo produzido no Brasil quase que exclusivamente para emprego no setor de fibras, mas outras aplicações aumentariam o consumo deste polímero. Assim, o desenvolvimento de Nylon 6 para outros fins, como por exemplo no setor de plásticos de engenharia (eletrodomésticos e setor automotivo) é necessário para diversificar o seu consumo, direcionando-o a novos mercados, como forma de garantir a sua permanência e utilização neste setor altamente competitivo, que é o setor de plásticos como um todo, no qual, em face da globalização, os diversos produtos passam a competir nos mais diversos campos de aplicação. Este trabalho compreendeu o projeto conceitual, detalhamento de projeto, desenvolvimento, construção, montagem e definição de procedimentos experimentais da planta piloto, de modo a reproduzir, em escala piloto, as condições do processo industrial de polimerização em batelada. Concluída a etapa de projeto, construção e montagem, e comissionamento da planta, foram realizados testes pré-operacionais, com análise e correção dos problemas verificados. Foram realizadas duas corridas experimentais e as amostras do polímero obtido foram caracterizadas e comparadas às amostras padrões fornecidas por indústrias locais. A planta desenvolvida se mostrou operacional e flexível para o desenvolvimento de Nylon 6 com características controladas, o que é necessário para as possíveis aplicações como plástico de engenharia / Abstract: This investigation aimed to propose the design of a Nylon 6 pilot plant polymerization for the development of new applications. The process adopted is the hydrolytic polymerization of nylon 6 from epsilon-caprolactam monomer comprising vaporization of both, monomer and water, in a batch operated reactor. The Nylon 6 has been produced in Brazil almost exclusively for fiber sector employment, and new applications are welcome to increase the production of such polymer. Thus, the development of Nylon 6 for other purposes, such as in engineering plastics sector (appliances and automotive) is necessary to diversify their consumption, directing you to new markets as a way to ensure its permanence and use this highly competitive industry, which is the plastics industry as a whole, which, in the face of globalization, the products are competing in various application fields. This research work comprised the proposal of a conceptual design, detailed design, development, construction, installation and definition of experimental procedures of a pilot plant, for Nylon 6 polymerization, in order to be able to reproduce in a pilot plant scale, industrial process conditions in batch polymerization. After the design phase, construction, assembly, and plant commissioning, pre-operational tests were performed, with analysis of the results and correction of detected problems. Two experimental runs were performed and samples of the polymer obtained were characterized and compared with standard samples supplied by local industries. The pilot plant proved to be and operational with a good degree of flexibility to the development of Nylon 6 with controlled characteristics, which is necessary for the potential applications as engineering plastics / Doutorado / Desenvolvimento de Processos Químicos / Doutor em Engenharia Química

Professional imaging systems, particularly motion picture cameras, usually employ larger photosites and lower pixel counts than many amateur cameras. This results in the desirable characteristics of improved dynamic range, signal to noise and sensitivity. However, high performance optics often have frequency response characteristics that exceed the Nyquist limit of the sensor, which, if not properly addressed, results in aliasing artifacts in the captured image. Most contemporary still and video cameras employ various optically birefringent materials as optical low-pass filters (OLPF) in order to minimize aliasing artifacts in the image. Most OLPFs are designed as optical elements with a frequency response that does not change even if the frequency responses of the other elements of the capturing systems are altered. An extended evaluation of currently used birefringent-based OLPFs is provided. In this work, the author proposed and demonstrated the use of a parallel optical window p ositioned between a lens and a sensor as an OLPF. Controlled X- and Y-axes rotations of the optical window during the image exposure results in a manipulation of the system's point-spread function (PSF). Consequently, changing the PSF affects some portions of the frequency components contained in the image formed on the sensor. The system frequency response is evaluated when various window functions are used to shape the lens' PSF, such as rectangle, triangle, Tukey, Gaussian, Blackman-Harris etc. In addition to the ability to change the PSF, this work demonstrated that the PSF can be manipulated dynamically, which allowed us to modify the PSF to counteract any alteration of other optical elements of the capturing system. There are several instances presented in the dissertation in which it is desirable to change the characteristics of an OLPF in a controlled way. / In these instances, an OLPF whose characteristics can be altered dynamically results in an improvement of the image quality. / by Branko Petljanski. / Thesis (Ph.D.)--Florida Atlantic University, 2010. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2010. Mode of access: World Wide Web.

Thesis (Ph. D.)--State University of New York at Binghamton, Department of Chemistry, 2006. / Includes bibliographical references.