Global ETD Search
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 14 of 14 for “"Polymer Foam"”.
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Preparation and investigation of polymer-foam films and polymer-layer systems for ferroelectrets
… ferroelectric ceramics and ferroelectric polymers, ferroelectrets have recently become a new group of piezoelectrics. Ferroelectrets are functional polymer systems for electromechanical transduction, with elastically heterogeneous cellular structures and internal quasi-permanent dipole …
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The effect of Meranti Merah wood fiber loading and sizes to the absorption property of polymer foam composites
… plays important roles in acoustic engineering. Polymer foam composites (PFC) were developed for absorption material based on epoxy, renewable monomer from waste cooking oil, isocyanates and wood fiber fillers. The polymer foam composite (PFC) were fabricate based on four percentages of wood …
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Experimental and numerical investigation of ballistic impacts: an introduction to novel polymer foam core sandwich structures and adaptive SPH formulation
Embargo set by: Colleen Fallaw for item 102576 Lift date: 2019-08-10T21:25:30Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system
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The development and characterization of lightweight (CA,MG) ceramics
… of less than 0.35 by the polymer foam technique, and higher than 0.35 by the polymer powder technique. The polymer powder method forms an inhomogeneous pore structure having average pore sizes of 30-80 μm compared with the polymer foam method, which yields a large and …
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Rheology Of Cross-Linked Polymers And Polymer Foams: Theory And Experimental Results
<p>Typical polymers have a time-dependent response to loading which results in stress relaxation or creep. Models using springs/dashpots or Volterra integrals are capable of predicting the material response, but place little or no emphasis on the reasoning behind the response. This research …
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Characteristic of renewable polymer incorporated with stabilizer to characterize the endurance to ultra voilet irradiation exposure
… raw materials for production of renewable polymer because of their versatility with high possibility to modify the chemical structure of triglycerides and it derivatives. In this study, waste vegetable oil was synthesized and crosslink with polymethane polyphenyl isocyanate, distilled water …
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Energy absorption performance of braided basalt reinforced composite tubes under axial loads
… of fibre reinforced sandwich composite tube with polymer foam-core could have a higher potential to provide both demands of high energy absorption capacity as well as light-weighting structure. Due to the recent environmental awareness, natural basalt fibre has been getting more demand and …
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Physical and acoustic properties of petroleum and renewable based polyurethane foam filled with shorea leprosula
… (PU) and renewable based polyurethane (RPU) foam composites filled with Shorea Leprosula (Red Meranti) fiber filler has been investigated. Shorea Leprosula wood dust namely as SL was used as the filler. RPU was used with hope to substitute the current polyurethane. This research was carried …
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Biodegradable polymer scaffold fabrication and the creation of tissue-engineered bone
… cell transplantation within porous biodegradable polymer foam scaffolds. The work presented in this thesis was aimed at creating a porous biodegradable scaffold with appropriate mechanical properties, which in concert with an appropriate vascular environment, would be sufficient to create tissue …
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FRP-Based High-Performance Building Envelopes - An investigation on the environmental performance of GFRP sandwich panels
… problematic and costly. Glass fibre reinforced polymer (GFRP) sandwich panels consisting of GFRP laminate face sheet and adhered to a polymer foam core can potentially provide an integrated, loadbearing and lightweight solution for geometrically complex building envelopes. One of the barriers to …
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Foam formation in a PMMA-methanol system
… the generation of low density and low cell size polymeric foams. Specifically, this means to understand what parameters contribute to an increase in nucleation density and a decrease in cell size. Polymeric foams with low cell size and density serve a lot of different applications such as …
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Absorption-Dominant Electromagnetic Interference Shielding Polymer Composites and Foams
The development of conductive polymer composites (CPCs) and foams offers a promising solution for achieving absorption-dominant electromagnetic interference (EMI) shielding while mitigating secondary electromagnetic pollution. Despite the significance of structural and geometrical factors in …
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Blast Resilience of Glazed Façades: Towards a New Understanding of the Post-Fracture Behaviour of Laminated Glass
… laminated glass specimens were impacted with polymer foam projectiles, launched from a gas gun. These tests aimed to simulate the loading from a blast pulse. The dynamic bending response was subsequently recorded with a high-speed camera. Nine different test types were performed by varying the …
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Multifunctional composite structures with damage sensing capabilities
… of nanotechnology to control the properties of polymer foam systems as part of multifunctional sandwich composite structures has been validated and proven feasible. Electrically conductive nano-composite foams were developed at a varying range of densities. The level of conductivity was …