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Relevant bibliographies by topics / Polymer engineering and science / Dissertations / Theses

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Dissertations / Theses on the topic 'Polymer engineering and science'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Harton, Shane Edward. "Investigation of Polymer Phase Behavior at Heterogeneous Polymer-Polymer Interfaces using Secondary Ion Mass Spectrometry." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-03012006-131419/.

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Changes in the thermodynamic behavior of polymer blends from bulk to heterogeneous interfaces is investigated using secondary ion mass spectrometry (SIMS). The use of a magnetic sector spectrometer (CAMECA IMS-6f) is fully explored in order to determine the optimal conditions in which to probe polymer surfaces and heterogeneous interfaces using three bilayer film systems, namely polystyrene (PS) with poly(methyl methacrylate) (PMMA), poly(cyclohexyl methacrylate) (PCHMA) with PMMA, and PS with poly(2-vinylpyridine) (P2VP). Two primary ion beams have been employed, O2+ with detection of positiv

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2

Moran, Stephanie E. (Stephanie Elizabeth). "Polymer coated superparamagnetic beads walking on polymer coated surface." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76123.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 30-31).<br>Biology has provided us with many organisms that are able to propel themselves through a fluid using cilia or flagella. This provides inspiration to create controllable systems that cannot only propel an organism or device through a fluid but can also create a fluid flow. Research has focused on how to mimic the mechanisms of these organisms for the use in microfluidic devices or drug delivery. Thi

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3

Ong, Lawrence Eric 1979. "Assessment of collagen based polymer scaffolds for tissue engineering." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8425.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2002.<br>Includes bibliographical references (p. 52-56).<br>The use of collagen-glycosaminoglycan copolymers in tissue engineering scaffolds has seen promise to date in skin regeneration templates, hollow nerve guides for peripheral nerve regeneration, and conjunctiva regeneration. Future applications appear to be directed toward both in vivo and in vitro engineering of complex cellular systems, with significant progress being prevented by a lack of biological knowledge concerning cell-matrix in

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4

Masson, Jean-François. "Cellulosesynthetic-polymer blends." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74661.

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Blends of cellulose (CELL) with polyvinyl pyrrolidone (PVP), poly(4-vinyl pyridine) (P$ sb4$VPy), polyvinyl alcohol (PVA), polyacrylonitrile (PAN), poly($ epsilon$-caprolactone) (PCL), and nylon 6 (Ny6), and of chitosan with PVA were investigated in an attempt to gain some insight into the factors that affect the miscibility of cellulose with synthetic polymers. The miscibility and the scale of mixing of the various blends were studied by differential scanning calorimetry, dynamic mechanical analysis, infrared and NMR spectroscopy, and proton spin-lattice relaxation measurements. The CELL/PVP,

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5

Sandusky, Donald Allan. "Fabrication of thermoplastic polymer composite ribbon." W&M ScholarWorks, 1995. https://scholarworks.wm.edu/etd/1539616840.

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The goal of this research was to develop a controllable process to convert a thermoplastic powder-coated carbon-fiber towpreg into uniform and consolidated ribbon. The approach comprised four primary activities. (1) The patent and processing literature was studied to evaluate the state of the art. (2) A functional ribbon fabrication technique was developed by scaling-up, in a novel configuration, hardware components found in the literature. (3) The ex parte ribbonizing process was characterized by calibrating equipment, determining steady state and studying cause and effect between process par

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6

Brigham, Mark D. "Collagen and hyaluronic acid interpenetrating polymer networks for tissue engineering." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/45810.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.<br>Includes bibliographical references (leaves 68-70).<br>Interpenetrating Polymer Networks (IPNs) represent a strategy for combining the properties of several polymeric materials into a single network. In this thesis, collagen and methacrylated hyaluronic acid are combined in IPNs to produce a range of new biocompatible. The fabrication method allows for control of compressive strength of the IPN hydrogels. The materials are confirmed to be homogeneous at microscopic scales wit

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7

Odero, Christine A. (Christine Adhiambo). "Polymer gel spinning machine." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/34092.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.<br>Includes bibliographical references (leaves 117-118).<br>by Christine A. Odero.<br>M.S.

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8

Pridmore, Derik A. (Derik Arnold) 1978. "Online polymer crystallization experiment." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33335.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.<br>Includes bibliographical references (leaves 119-120).<br>An architecture for online remote operation of a polymer crystallization experiment was refined, beta tested in actual use conditions, and extended based on feedback from those tests. In addition, an application for graphically simulating macroscopic crystal spherulite growth was developed for use as an educational tool. Finally, the experiment was used in the design process for modifying the generic iLab framework to i

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9

Sing, Charles Edward. "Blood clotting inspired polymer physics." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/79554.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>The blood clotting process is one of the human body's masterpieces in targeted molecular manipulation, as it requires the activation of the clotting cascade at a specific place and a specific time. Recent research in the biological sciences have discovered that one of the protein molecules involved in the initial stages of the clotting response, von Willebrand Factor (vWF), exhibits counterintuitive and tec

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10

Alcazar, Jorba Daniel. "A conjugated polymer plastic gel." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45359.

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Includes bibliographical references (p. 107-119).<br>Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008.<br>We present a gel route to process highly oriented conjugated polymer films and fibers. The incorporation of hexafluoroisopropanol, a strong and stable dipolar group, to the polythiophene backbone enhances the solubility and especially, the hydrogen bond forming capabilities of the polymer. This functionalization enables the polymer to build up an isotropic self-supporting network structure based on a combination of polymer-polymer ch

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11

Mahmad, Rasid Irina. "Dynamics of associative polymer networks." Thesis, Massachusetts Institute of Technology, 2021. https://hdl.handle.net/1721.1/130675.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, February, 2021<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references.<br>Associative polymer networks are a versatile class of materials as demonstrated by their use in a wide variety of applications including biomaterials, viscosity modifiers and underwater adhesives. The viscoelastic and transport properties displayed by these associative networks can be tuned by careful design of the polymers that make up the network, as well as the transient interactions be

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12

Liu, Ruofan. "A Novel Methodology for Durability Assessment of Rubber Materials." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525784654741047.

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13

Tarkanian, Michael J. (Michael James) 1978. "Prehistoric polymer engineering : a study of rubber technology in the Americas." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/98335.

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14

Sumanasinghe, Ruwan Deepal. "Functional Bone Tissue Engineering using Human Mesenchymal Stem Cells and Polymeric Scaffolds." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-11092006-132359/.

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Functional bone tissue engineering has been necessitated by the need to treat critical size defects in bones due to birth abnormalities, trauma, and pathological conditions. Appropriate conditions for in vitro osteogenesis need to be identified to establish protocols for engineering bone tissues. The success of in vitro osteogenesis lies on the type of cell source, stimuli, and scaffold material used for engineering bone constructs. Recent investigations have established the pluripotency of mesenchymal stem cells (MSCs) and their ability to differentiate down a multitude of pathways including

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15

Abbott, Andrew Carl. "Characterization of Creases in Polymers for Adaptive Origami Engineering." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1406890919.

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16

Mitwalli, Ahmed Hamdi. "Polymer gel actuators and sensors." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9969.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.<br>Includes bibliographical references (p. [351]-361).<br>by Ahmed Hamdi Mitwalli.<br>Sc.D.

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17

Zhang, Guoqiang. "The Synthesis and Electrical Properties of Functional Polymer Nanocomposites." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case149010222646324.

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18

Bédard, Matthieu. "Optically addressable, integrative composite polymer microcapsules." Thesis, Queen Mary, University of London, 2009. http://qmro.qmul.ac.uk/xmlui/handle/123456789/395.

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The development of remotely addressable tools to encapsulate, store and deliver active materials to living cells is a particularly challenging topic of material science. As drug delivery agents, microcontainers not only require high mechanical stability or to be delivered at target cells, but they should also possess efficient remotely addressable release mechanisms. Light responsive polyelectrolyte capsules are well suited for such purposes. Capsules are constructed using the Layer‐by‐Layer technique where oppositely charged polymers are alternatively deposited on a sacrificial template. The

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19

Li, Shuangwu. "Surface properties of electrospun polymer nanofibres." Thesis, Queen Mary, University of London, 2010. http://qmro.qmul.ac.uk/xmlui/handle/123456789/548.

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Fibrous materials are used in a variety of applications due to their relatively high surface area to volume ratio as well as anisotropic behaviour. Electrospinning is a popular fabrication technique which produces polymer nanofibres with a potentially high molecular orientation. The surface of polymer fibres plays a significant role in many applications thus measurement of their surface properties is essential but challenging due to their relatively small size. In this thesis, ultrafine nanofibres have been produced by electrospinning with their nanofibre morphology controlled by varying diffe

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20

Nasser, Paola B. (Paola Beatriz) 1979. "Remote microscope for Polymer Crystallization WebLab." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/87281.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.<br>Includes bibliographical references (leaves 65-66).<br>by Paola B. Nasser.<br>M.Eng.

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21

Thai, Emily (Emily Sue). "TCAQ-based polymer for electrochemically mediated separations." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111357.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 35-36).<br>Redox-mediated separation systems offer the potential to efficiently desalinate water and to purify contaminated waste streams, among other health and environmental applications. A TCAQ-based polymer, unique for its two-electron redox reaction, was synthesized for use in redox-mediated separation systems, and its performance was quantified in low-concentration aqueous salt solutions. The pol

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22

Saif, Addin Burhan K. (Burhan Khalid). "The challenges of organic polymer solar cells." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/62740.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 108-110).<br>The technical and commercial prospects of polymer solar cells were evaluated. Polymer solar cells are an attractive approach to fabricate and deploy roll-to-roll processed solar cells that are reasonably efficient (total PV system efficiency>10%), scalable and inexpensive to make and install (<100 $/m2). At a cost of less than 1$/Wp, PV systems will be able to generate electricity in most geog

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23

Pavlish, John R. "Polymer substrates with microneedles for epidermis injection." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/58379.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 31).<br>Injections of medicine into the body are commonplace, whether they be intravenous or capsules. The benefit of using a macroneedle for injecting cargo into the circulatory system is its simplicity. However, introduction of the needle intravenously can also include foreign matter if the needle is unsterile. Due to macroneedles ability to pierce skin and veins for effortless insertion, it can also damage

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24

Sing, Michelle Kay. "Structure-property relationships in physical polymer gels." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111330.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Associating polymer networks are included in a large number of materials where it is important to control and tune the rheological response of the material, particularly including responses to temperature, shear, or changes in the surrounding environment. Knowledge of the relationship between the kinetics of the end-groups that form these associations and the mechanical behavior of the network can provi

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25

Vandesteeg, Nathan A. (Nathan Alan). "Synthesis and characterization of conducting polymer actuators." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38514.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2007.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references.<br>Conducting polymers are known to mechanically respond to electrochemical stimuli and have been utilized as linear actuators. To date, the most successful mechanism for actuation is ionic ingress and egress, though mechanisms based on conformational changes and molecular interactions have also been pr

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26

Gama, Nuno 1974. "Durability of epoxy polymer concrete overlays for bridge decks." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21293.

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Epoxy-based flexible polymer concrete overlays have been used in the past 15 years in North America to protect the bridge deck from deterioration, to extend the service life, and to improve skid resistant of the riding surface. While 15 years of field applications have demonstrated the effectiveness of the protection offered by the technique, cracking and delamination failures have also been observed.<br>The purpose of the research reported herein is to understand the mechanism of durability failure of the epoxy polymer concrete overlay system. The tests conducted were water permeability, chlo

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27

Chan, Philip Kwok-Kiou. "Formation and performance of polymer dispersed liquid crystal films." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ36963.pdf.

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28

Mehra, Nitin. "Thermal Conduction in Polymer Based Materials by Engineering Intermolecular Interactions." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1578202939238852.

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29

Guo, Jiao. "Development of Ion Conductive Polymer Gel Electrolytes and Their Electrochemical and Electromechanical Behavior Studies." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1279140041.

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30

Shin, Y. Michael (Young-Moon Michael) 1969. "Formation of polymer nanofibers from electrified fluid jets." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/8848.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2000.<br>Includes bibliographical references (leaves 176-182).<br>The formation of polymer nanofibers from fluid jets in· an electric field, also referred to as electrospinning, has been studied. Controlling the fiber properties requires a detailed understanding of how a millimeter-diameter fluid jet emanating from a nozzle is transformed into solid fibers that are four orders of magnitude smaller in diameter. To this end, a fiber spinner operating under a uniform electric field and providing a c

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31

Feuchtwanger, Jorge. "Energy absorption in Ni-Mn-Ga/ polymer composites." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35311.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (p. 139-143).<br>In recent years Ni-Mn-Ga has attracted considerable attention as a new kind of actuator material. Off-stoichiometric single crystals of Ni2MnGa can regularly exhibit 6% strain in tetragonal martensites and orthorhombic martensites have shown up to 10% strain when subjected to a magnetic

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32

Chen, Suelin Ph D. Massachusetts Institute of Technology. "Polymer-coated iron oxide nanoparticles for medical imaging." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59004.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2010.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. 144-157).<br>One of the most versatile and safe materials used in medicine are polymer-coated iron oxide nanoparticles. This dissertation describes several formulations for in vivo imaging applications. The paramagnetic polymer-coated iron ox

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33

Moalli, John Edward. "The mechanical behavior of high performance polymer fibers." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/17304.

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34

Schaub, Thomas Francis. "Chain end segregation at polymer thin film surfaces." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32664.

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35

Tsinberg, Anait. "Evaluation of novel autonomous self-healing polymer composite." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45355.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>"September 2008."<br>Includes bibliographical references (p. 61-63).<br>Autonomous self-healing materials offer a novel ability to self-repair damage caused by fatigue or fracture. Applications in many industries, from medical to aerospace, suffer from formation of microcracks, which often result in catastrophic failure of the product whe

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Hester, Jonathan F. (Jonathan Forrest) 1971. "Surface modification of polymer membranes by self-organization." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/28228.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2001.<br>Vita.<br>Includes bibliographical references (p. 235-255).<br>Water filtration processes employing polymer membranes have become increasingly important over the past forty years. Due to their high efficiency and modularity relative to conventional processes, membrane separations are among a suite of emerging water treatment technologies which will make possible future water use sustainability, by enabling the decentralization of wastewater treatment and the recycling of currently unused

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37

Harry, Katherine Joann. "Lithium dendrite growth through solid polymer electrolyte membranes." Thesis, University of California, Berkeley, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10150902.

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<p> The next generation of rechargeable batteries must have significantly improved gravimetric and volumetric energy densities while maintaining a long cycle life and a low risk of catastrophic failure. Replacing the conventional graphite anode in a lithium ion battery with lithium foil increases the theoretical energy density of the battery by more than 40%. Furthermore, there is significant interest within the scientific community on new cathode chemistries, like sulfur and air, that presume the use of a lithium metal anode to achieve theoretical energy densities as high as 5217 W&dot;h/kg.

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Imaad, Syed M. (Syed Muhammad). "Injectable polymer for in vivo oxygen sensing." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/79228.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2013.<br>"February 2013." Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 57-60).<br>This thesis documents the synthesis and characterization of an elastomeric polymer that is oxygen sensitive and can be interrogated using Magnetic Resonance Imaging (MRI) or Magnetic Resonance (MR) technology to report the oxygen tension in vivo at the site of implant. The polymer was tested for its sensitivity in response to oxygen, and the specificity of respon

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Rogozinski, Jeffrey David. "In-situ frequency-dependent electromagnetic sensing for monitoring physical and chemical attributes during chemical processing." W&M ScholarWorks, 2000. https://scholarworks.wm.edu/etd/1539623978.

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The objective of this research was to develop an in-situ sensing technique that monitors the molecular-level response of ions and dipoles to an applied electric field in order to characterize the changes in state of a polymer resin during chemical processing. This technique needs to be capable of monitoring the reaction progress not only in the laboratory setting but also in-situ in the processing tool or reaction environment. Frequency Dependent Electromagnetic Sensing (FDEMS) was selected for this task.;This dissertation investigates the applicability of FDEMS to monitoring two types of proc

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Roberts-McDaniel, Patricia D. "Physical and mechanical behavior of amorphous poly(arylene ether-co-imidazole)s and poly(arylene ether-co-imidazole) modified epoxies." W&M ScholarWorks, 1994. https://scholarworks.wm.edu/etd/1539623850.

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Due to the high crosslink density of cured epoxy resins they generally lack damage tolerance. A significant amount of research has been expended to improve the toughness of epoxies. Research into the area of thermoplastic epoxy modifiers has begun to overcome some of the limitations of early methods of epoxy toughening (i.e. lower modulus and thermal stability).;This study examines the physical and mechanical properties of random poly(arylene ether-co-imidazole) (PAE-co-Is) and the characterization of epoxies modified with poly(arylene ether-co-imidazole)s.;Poly(arylene ether-co-imidazole)s ex

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Wood, Karen H. "The thermal cure of phenylethynyl-terminated polyimides and selected model compounds." W&M ScholarWorks, 1997. https://scholarworks.wm.edu/etd/1539623896.

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The ability to process high performance polymers into useful adhesives and high quality composites has been significantly advanced by synthetic techniques in which oligomers terminated with reactive groups cure or crosslink at elevated temperature after the article has been fabricated. Several matrix resin systems of considerable interest to the aerospace community utilize phenylethynyl terminated imide (PETI) technology developed at the Langley Research Center to achieve this advantage. This work addresses the cure chemistry of PETI oligomers.;The thermal cure of selected oligomers and model

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Bélanger, Christian. "Characterization of polymer blend morphology from patterns of reflected scattered light." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39740.

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The morphology and properties of polymer blends are closely related to processing conditions. The minor phase dimensions usually range from 0.1 to 10 $ mu$m. A skin/core morphology, with a minor phase undergoing variations in orientation and aspect ratio from the surface to the core of the material is observed in processes such as the injection molding of blends. The use of optical inspection is a potential tool to control the stability and the quality of the product on-line. In this thesis, polymer composites made from different glass fibers and glass microspheres embedded in a matrix of PS a

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Qi, Zhigang. "Synthesis of conducting polymer colloids, hollow nanoparticles, and nanofibers." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40229.

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Colloidal polypyrrole and polyaniline stabilized by anionic surfactants were prepared and characterized. A "pseudo-micelle" model has been proposed. The aggregation of pseudo-micelles on the forming polymer chains is believed to be the key step in the stabilization process. Only when the aggregation is possible and fast enough to follow the polymer formation, will the polymer be stabilized.<br>Colloidal polypyrrole and polyaniline were prepared in the presence of the sodium salt of poly(styrene sulfonate). The polymerization is believed to follow a template-guided fashion in which poly(styrene

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Rubio, Mario A. "Microexplosions and Ignition Dynamics in Engineered Aluminum/Polymer Fuel Particles." Thesis, Purdue University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10268368.

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<p> Aluminum particles are widely used as a metal fuel in solid propellants. However, poor combustion efficiencies and two-phase flow losses result due in part to particle agglomeration. Recently, engineered composite particles of aluminum (Al) with inclusions of polytetrafluoroethylene (PTFE) or low-density polyethylene (LDPE) have been shown to improve ignition and yield smaller agglomerates in solid propellants. Reductions in agglomeration were attributed to internal pressurization and fragmentation (microexplosions) of the composite particles at the propellant surface. </p><p> Here, we e

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Akthakul, Ariya 1973. "Design of chemistry and morphology of polymer filtration membranes." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29966.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2003.<br>Vita.<br>Includes bibliographical references.<br>To improve membrane materials in water filtration, which currently display broad pore size distribution, hydrophobic chemistry, and fouling behavior, a novel design of chemistry and morphology of membranes is employed. First, through fundamental studies of morphological formation both in bulk by lattice-Boltzmann (LB) simulation methods and at the surface by observation of electron micrographs, it is illustrated that phase separation via

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Martin, Christopher S. "Controlled Release of Alkalinity Using pH-Responsive Polymer Carriers." Thesis, Tufts University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10165326.

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<p> Low groundwater pH is frequently cited as inhibiting the performance of in-situ bioremediation of chlorinated solvents at contaminated sites. A common method of pH control is injection of solutions containing alkalinity, but alternatives for prolonged, passive pH control are needed. This work explores pH-responsive hydrogel coatings on MgO nanoparticles as vehicles for controlled release of alkalinity. Chitosan cross-linked with glutaraldehyde was evaluated as a representative hydrogel coating. The effects of coating thickness and cross-linking on the rate of alkalinity release were experi

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Lee, Kevin Shao-Kwan. "Large core polymer optical backplanes for fluorescence detection." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37944.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006.<br>Includes bibliographical references (p. 203-205).<br>Fluorescence based sensors are used for determining environmental parameters such as dissolved oxygen or pH in biological systems without disturbing a biological system's equilibrium. Recently, there has been a drive to provide biological analysis tools in a compact form, resulting in arrays of miniature devices which can perform multiple functions in parallel such as bacteria cultures or DNA analysis. As these new types of ch

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Mohd, Salleh Mohd Hazimin. "Polymer waveguide micro-resonators for optical biosensors." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2461/.

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This work describes the investigation of optical ring or disk micro-resonator as elements in label-free biosensing devices. The use of polymeric materials for micro-resonator structures recently has been gain major interest multi disciplinary research since it allows rapid and straightforward fabrication process. The aim of the work described here was to develop an optical biosensor which operates within the visible range of λ = 500 – 800 nm based on micro-resonator principle by exploiting the SU-8 polymer material. This thesis is focused on fabrication procedures using the electron beam litho

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Wheeler, Nicholas Robert. "Lifetime and Degradation Science of Polymeric Encapsulant in Photovoltaic Systems: Investigating the Role of Ethylene Vinyl Acetate in Photovoltaic Module Performance Loss with Semi-gSEM Analytics." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1473440287427776.

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Shylaja, Nair Sithara. "Engineering Icephobic Coatings: Surface Characterization of Pt cured Silicones." VCU Scholars Compass, 2017. https://scholarscompass.vcu.edu/etd/5196.

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Ice buildup on structures leads to problems that include reduced performance, structural damage and power outages. It is therefore important to limit the energy required for removal of ice from substrates to minimize buildup. Understanding the mechanism of ice adhesion and its dependence on variables like coating thickness, stiffness, surface free energy and morphology is critical for minimizing adhesion. Despite several developments in “icephobic” coatings, which are those that have low ice adhesion, it is important to understand adhesion on the fundamental level to make way for advanced coat

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