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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 64 for “"polyvinyl chloride"”.
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Hot gas welds in unplasticised polyvinyl chloride.
… a feature of hot gas welded clear unplasticised polyvinyl chloride (UPVC), Typical weld strengths are 20-30 MPa compared to 45 MPa for hot gas welded filled UPVC and 61 MPa for hot tool welded clear UPVC. A short mechanical, microstructural and chemical analysis revealed only minor differences …
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The bonding of plasticized polyvinyl chloride sheet to metal
… the factors affecting the bond strength between polyvinyl chloride sheeting and metal. The metals used in this investigation were aluminum, brass, copper, nickel, low carbon steel, and stainless steel. The plastic sheeting was bonded to the metal by means of synthetic adhesive. Five different …
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Effect of concentrated loads on shallow buried polyvinyl chloride and polyethylene tubing.
Thesis. 1975. M.S.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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Upcycling of Polystyrene, Polyolefin, and Polyvinyl Chloride Waste into Chemicals, Surfactants, and Lubricants
… such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and polystyrene (PS), account for >60% of annual plastic production owing to their excellent physicochemical and mechanical performance in many applications. As a consequence of widespread use, addition polymerization …
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The effects of load, frequency, slip amplitude, humidity and film thickness of polyvinyl chloride on fretting corrosion
… of slip, humidity, and film thickness of polyvinyl chloride on fretting corrosion. In particular, this study describes the effects of these parameters on the polymer film life and also on the wear of the metal surfaces after metallic contact had occurred. The two levels that were used for …
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Study of radio frequency inductively coupled thermal plasma torch (RF ICPT) for radioactive waste treatment: thermoplastics - polyethylene and polyvinyl chloride (PVC)
… power plants (NPPs), thermoplastics such as polyvinyl chloride (PVC) and polyethylene (PE) contribute significant amount to the overall volume of RW. The presence of radioactive nuclides in PVC and PE waste originating from NPPs and their plastic nature (non-bio-degradable characteristics) …
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PVC stabilisers based on metal carboxylates
… and olefinic unsaturation are formed rapidly in Polyvinyl chloride (PVC) as a consequence of mechanical shearing of the polymer chains during the processing operation. The concentration of these species in the polymer before processing is negligible compared with that produced mechano-chemically …
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Investigating the Relationship between Small and Large Scale Test Methods for the Combustion Toxicity of Cables
… the comparison of combustion toxicity between Polyvinyl Chloride (PVC) and a selection of Low Smoke Zero Halogen (LSOH) cable materials.
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The effects of load and humidity on friction and life of polymeric coatings used to prevent fretting corrosion
… humidity effect seen in a previous study with polyvinyl chloride is strictly a chlorine related phenomenon. The five polymers used were polyvinyl chloride, polyvinylidene chloride, polystyrene, and two siloxane modified polyimides. Disks made of 1045 steel were coated with thin polymeric films …
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The adsorption of vinyl chloride and vinylidene chloride monomers on their polymers
… of the kinetics and equilibria of:- (a) Vinyl chloride monomer vapour adsorbed on polyvinyl chloride; (b) Vinylidene chloride monomer vapour adsorbed on polyvinyl chloride; (c) Vinylidene chloride monomer vapour adsorbed on polyvinylidene chloride; it became evident that, for a number of …
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Adherence and Biofilm Formation of Mycobacterium avium, Mycobacterium intracellulare, and Mycobacterium abscessus in household plumbing
… including glass, copper, stainless steel, polyvinyl chloride, and galvanized steel. All experiments were conducted with sterile, Blacksburg tap water in a CDC Biofilm Reactor. Highest adherence was observed by M. avium on galvanized steel surfaces, reaching 15,100 CFU/cm2 surface at 6 hours …
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Effects of packaging and soy protein isolate antioxidant on lipid oxidation of ground beef
… TM}$ overwrapped with aluminum foil or polyvinyl chloride (PVC), exposed to retail display light (4$\sp\circ$C) for 24 h and then held frozen ($-$18$\sp\circ$C) for 52 weeks. Instrumental and visual color of PVC-packaged beef was damaged most by display and by frozen storage. During …
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The use of thin polymeric coatings to prevent fretting corrosion and metallic contact in steel-on-steel systems
… polytetrafluoroethylene (PTFE), polyimide (PI), polyvinylidene fluoride (PVDF), polyvinylidene chloride (PVDC), polyvinyl chloride (PVC), low-density polyethylene (LOPE), high-density polyethylene (HDPE), polysulfone (PSO) and polystyrene (PS). These polymers were applied as thin films to a steel …
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Aging model for commercial polymers
Physical aging of polyvinyl chloride, high-density polyethylene, and polyester reinforced with polyester fibers specimens have been investigated. These materials are commercially available and are currently used in trenchless relining of sewer pipes. The analysis uses the effective-time theory and …
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Lightning effects on underground distribution cable using alternative transient program
… of 33kV Cu/XLPE/CWS/PVC/HDPE insulated armoured Polyvinyl Chloride (PVC) sheathed cable rated was modelled. A 40 kV lightning current with 1.2/50 μs characteristic has been injected into the system. Several models cable and also soil to represent the whole system in electronic circuit have been …
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Surface Modification of Commonly used Polymer Plastics for Increased Hemocompatibility in Medical Equipment
… terephthalate (PET), polycarbonate (PC), polyvinyl chloride (PVC), polypropylene (PP), poly (methyl methacrylate) (PMMA), polyurethane (PU), polysulfone (PS). All materials had MEG-OH adlayer formed and characterized with x-ray photoelectron spectroscopy, attenuated total internal …
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The Effect of Temperature on the Material Stiffness of Field Hockey Balls for Material Selection
… temperature affects the material properties of polyvinyl chloride (PVC). In particular, field hockey players report balls made of PVC breaking in half when hit in cold weather. Hockey ball manufacturers are interested in the effect of temperature on balls breaking to inform ball design and …
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A Survey on the Microscopical and Chemical Analysis of Synthetic Wig Fibers
… brown, blonde and black wigs made of modacrylic, polyvinyl chloride, polypropylene, and nylon fibers. These samples were first studied with light microscopy using both bright field illumination and double polarization. The physical and optical properties of the fibers were documented including: …
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