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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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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.
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Showing 1 to 10 of 60 (0.133 seconds)Spelling suggestions: "subject:"coatings & painted & finished"" "subject:"coatings & painted & finish""
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Polymeric interactions in tablet coating filmsSakellariou, P. January 1984 (has links)
The objective of this work was the investigation of the polymeric interactions in tablet coating films in relation with effective film formulations. The polymeric interactions were studied by means of torsional braid analysis. For this purpose an existing torsional braid analyser was improved and successfully interfaced to a microprocessor for data acquisition and reduction. Discussion on the contribution of the substrate to the thermomechanical spectra of the TBA as well as factors associated with the optimisation of the technique are presented. The dynamic mechanical behaviour of EC, HPMC, HPMCP-HP50, HPMCP-HP55, HPC and CAP film formers was studied with particular attention to structure- Tg relationship. The plasticisation of two of the most common film formers, namely EC and HPMC, with a series of polyethylene glycols was investigated. It was shown that PEGs efficiently plasticise HPMC, whereas they exhibited limited interactions with EC. The relation of the plasticising efficiency to the size and concentration of the PEGs with respect to the optimisation of the tablet coating formulation is also discussed. The thermomechanical behaviour of blends of EC with water-/pH-dependent film formers was also studied with TBA, in conjunction with the requirements for controlled release coatings. All polyblends exhibited phase separation and the required domain morphology, which was shown capable of retaining small amounts of water-/pH-dependent components even after prolonged leaching. Moreover, the modification of the thermomechanical performance of 80/20 w/w EC/HPMC blends plasticised with PEG200 and PEG400 was investigated. These studies indicated diffusion of the plasticisers into both phases. Finally, the effects of blend composition and interactions in terms of efficient sustained release coatings are identified and discussed.
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| 2 |
Deformation of hard coatings on softer substratesElliott, David Mark January 1991 (has links)
No description available.
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| 3 |
Mechanics of sprayed composite coatingsRamm, David Alfred John January 1995 (has links)
No description available.
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| 4 |
The erosion of plasma-sprayed alumina coatings by solid particle impactZhang, Xing Xing January 1991 (has links)
No description available.
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Characterisation of II-VI based semiconducting pigmentsJames, Ashley L. January 1994 (has links)
No description available.
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| 6 |
The photo-oxidation and stabilisation of water-based silica filled coatingsMorrow, Alison January 1999 (has links)
No description available.
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| 7 |
Photoconductivity and microwave dielectric studies on titanium dioxide pigmentsChow, Yuet Sim January 1992 (has links)
No description available.
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| 8 |
Some aspects of the structure and properties of spray-fused coatingsKehinde, M. A. O. January 1981 (has links)
No description available.
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| 9 |
The fracture mechanics properties of epoxy powder coatings used for corrosion protectionAl-Hassani, A. H. M. January 1983 (has links)
No description available.
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| 10 |
Nonlinear optical and electrical properties of hemicyanine dyesGeorge, Christopher David January 1997 (has links)
No description available.
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