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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 367 for “"Silicone"”.
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Rigid silicone resin studies
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Critical thickness in silicone thermosets
… below a critical dimension" is validated for silicone thermosets and polystyrene using novel "direct" methods by measuring failure strain in thin films. A discussion on polymer intrinsic deformation mechanisms is presented. Using these intrinsic deformation mechanisms as bases, it is argued …
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Adhesive properties of silicone resins
… properties of Phase I rubber toughened rigid silicone resins was performed to determine the possibility of an application such as structural adhesives. Single-lap shear tests were used to study several parameters, such as the thickness of the joint, the overlap length, the behavior at high …
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Critical thickness in silicone resin
… was determined for the Dow Corning 4-3136 silicone resin. 4-3136 is macroscopically brittle, but becomes up to ten times more ductile when it is processed in the form of a sufficiently thin film. Thickness was controlled for the thin films of amorphous polymer through solution composition …
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Toughening of rigid silicone resins
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
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Silicone resins and their composites
… cure (X1-2672) and condensation cure (4-3136) silicone resins have been studied for their mechanical property change with temperature. Properties include maximum flexural stress, flexural modulus and fracture toughness K[sub]IC. Temperature effect on mechanical properties of addition cure resin …
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Synthesis, Characterisation and Antifungal Activity of Copper(II)-Functionalised Silicone Polymers and Silicone-Coated Magnetic Nanoparticles
Two families of amine-functionalised silicone polymers were prepared using monomeric (3-aminopropyl)triethoxysilane (APTES) and (3-trimethoxysilylpropyl)diethylene triamine (TMSPDT). Schiff base derivatives of these polymers were synthesised using salicylaldehyde. The same suite of polymers were …
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Optimization of antimicrobial chitosan coating for silicone
… antimicrobial coatings, based on chitosan, for silicone elastomers, a common material in implants and other medical devices. Chitosan is a natural amino polysaccharide that is both antimicrobial and biocompatible.
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Synthesis and radiation stability of silicone elastomers.
A wide range of polymer samples based upon polydimethylsiloxane (PDMS) have been subject to gamma irradiation, and the subsequent effects analysed using a variety of techniques. The preparation of a series of blends and block copolymers of PDMS containing small amounts of polystyrene (PS) is …
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Adobe Conservation: Evaluation of Silicone and Acrylic Consolidants
Since soil and water were the most accessible building materials, humans used the mixture of soil and water to fabricate mud bricks or adobe. Iran, Syria, and Iraq have numerous mud brick buildings, and Arg-e Bam, located in Iran, was one of the most famous earthen monuments in the world; it was …
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Synand characterisation of silicone based mesophase forming materials.
The aim of this project was to synthesise and characterise a range of novel cyclic and linear mesogenic siloxanes. A synthetic strategy based upon the synthesis of linear side-chain siloxanes was adopted. End-functionalised linear siloxane precursors were synthesised via ring opening polymerisation …
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Tunable latency by catalyst encapsulation for silicone crosslinking
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Investigating silicone oil emulsification in eye chamber models
The emulsification of silicone oil in intraocular liquid is an unwanted complication occurring after retinal detachment repair. The repair surgery consists of removing most of the intraocular liquid and replacing it by a tamponade fluid. Silicone oils with dynamic viscosities in the range 1-5 Pa s …
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High fracture toughness and high modules silicone resins
Rigid silicone resins, generally referred to as polyalkylsilsesquioxanes, are an important class of hybrid thermosetting polymers with both inorganic and organic characteristics. They have superior thermal stability, heat resistance, fire resistance, and still can be easily processed. Silicone …
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Effects of Atomic Oxygen on Outgassing of Silicone Materials
… how atomic oxygen affects outgassing of silicones, which are of interest as atomic oxygen can alter the chemical composition of the surface of silicones. CV-2500, CV2-2289- 1, and SCV2-2590, three silicone elastomers that are products of NuSil Technology LLC, were tested. Significant …
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Silicone microspheres and disposable separation technology for gaseous analytes
… core-shell, and hollow or foamed micron-sized silicone spheres prepared via ultrasonic spray pyrolysis (USP). Silicones are found in an amazing number of commercial products including cosmetics, sealants, adhesives, lubricants, medical devices, and even food. Despite the prevalence of bulk …
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