- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 251 to 260 of 446 (0.014 seconds)| 251 |
Use of a torsion pendulum in investigating non-linear viscoelastic properties of solid polymersRahaman, M. N. January 1978 (has links)
No description available.
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| 252 |
Studies on Chemical Structure - Physical Property Relationships in Segmented Polyurethane FibresKumar, M. January 1978 (has links)
No description available.
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| 253 |
Electrical Resistance Studies on Nylon 6 MonofilamentMcCluskey, A. W. January 1977 (has links)
No description available.
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| 254 |
Thermal Stability of Polyurethane FibresPetrovic, Z. January 1974 (has links)
No description available.
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| 255 |
Chemical Structure - Physical Property Relationships in Wet Spun Polyurethane FibresFerguson, W. J. January 1974 (has links)
No description available.
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| 256 |
Density Studies on Nylon 6McKay, G. R. R. January 1977 (has links)
No description available.
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| 257 |
Stability of Post-Yield Deformation in ThermoplasticsCross, A. January 1977 (has links)
No description available.
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| 258 |
Stress fields in glassy polymers : with particular reference to the compressive failure of polystyreneKells, D. January 1979 (has links)
No description available.
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| 259 |
Modelling Plastics Pyrolysis by Thermogravimetry and Measurements of Molecular Weight DistributionCrewe, Robert John January 2007 (has links)
This thesis concerns the investigation of polymer pyrolysis by a combined approach of ' . , mathematical modelling and experimentation. This 'is done as a contribution towards better understanding how' materials behave in fire' situations. Thermogravimetric analysis has been investigated with regard to the accurate determination of kinetic parameters from thermogravimetric traces. This investigation has focused on various numerical methods that can determine the kinetic parameters from the curves and on correcting the buoyancy effect of the gas flowing through the analyser~ These mathematical techniques have then been applied to the thermogravimetric analysis of real plastics. The plastics investigated are; polystyrene, polymethyl methacrylate, polyvinyl chloride and flame retarded high impact polystyrene. Variations in kinetic parameters with heating rate are investigated in order to determine the ooent to which thermogravimetric analysis can shed light on fundamental chemical processes' occurring during pyrolysis. It is found that thermogravimetric analysis by itself is not realistically capable of shedding much' light on the chemistry occurring dl:lring pyrolysis. An alternative approach. that is subsequently considered is' to investigate polymer decomposition through variations in molecular weight distribution. This has allowed the description of polymer decomposition to be undertaken in terms of scission processes. In the cases of polystyrene and polymethyl methacrylate, it has been found (in agreement with the general literature) that the variations of molecular weight distribution are reminiscent of end-chain scission processes with small contributions of random scission. That said, it is also clear that there are features in both materials' decomposition profiles that requires further modelling. In the case of multi-component mixtures such as the flame retardant HIPS this modelling approach is unable to cope with the experimental observation in its current form.
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| 260 |
Investigation of Modifications to the Morphology of Synthetic PolymersNorris, G. I. January 1973 (has links)
No description available.
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