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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 10 of 10 for “"Extrusion foaming"”.
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Extrusion foaming of bioplastics for lightweight structure in food packaging
… followed. Creating lightweight structures by foaming is considered to be one of the effective ways to reduce material consumption, hence the reduction of density and morphology of PHBV-based foams using extrusion foaming technique were studied comprehensively in terms of extrusion conditions …
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In-line measurement of solibility of physical blowing agents in thermoplastic melts as related to extrusion foaming
… agent solubility in thermoplastic melts in extrusion foaming equipment has been developed in this study. This method uses video microscopy in connection with a foaming extruder (single or twin-screw) to generate solubility data by observing the onset of gas bubble formation/dissolution. This …
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Reactive modification and crystallization behavior of foamed poly(butylene terephthalate)
… and rheological characteristics by reactive extrusion. The scientific and/or engineering interpretation of the experimental data was based on fundamentals of extrusion, crystallization mechanisms, as well as information on reactivity and tendency toward degradation of PBT. As a preliminary …
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Reactive modification of polyesters and their blends
… for potential applications such as low density extrusion foaming or compatibilization of immiscible polymer blends. Important modification conditions through coagents are identified and reaction mechanisms are proposed. A high MW saturated polyester, PET, can also be rheologically modified in …
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A reactive melt modification of polyethylene terephthalate
… certain polymer processing operations such as extrusion blow molding or extrusion foaming to low densities. Among five different low MW difunctional and trifunctional epoxy compounds, triglycidyl isocyanurate is shown to be an efficient reactive melt modifier for commercially available …
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Rheology of Foaming Polymers and its Influence on Microcellular Processing
… properties and crystallization on low-density foaming behaviour of polylactic acid (PLA) are investigated. Understanding the rheological properties of foaming polymers allows the optimization of polymer chemical structure and the development of technologies that produce desired cell …
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Properties and foaming behaviour of thermoplastic olefin blends based on linear and branched polypropylene
… of industries including foam processing and extrusion foaming. The main objective of the thesis is to provide a detailed investigation on the rheological, morphological, thermal, mechanical and foaming properties of isotactic polypropylene / high melt strength branched polypropylene …
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Use of end-of-waste foamed fibers and aggregates into a cementitious mortar
… matrix, were produced in laboratory by melt extrusion-foaming process. Moreover, some chemical treatments (alkaline hydrolysis and sol-gel deposition of nanosilica) were performed on fibers, to improve chemical adhesion with the cement paste. Finally, taking into account the need for reducing …
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Profile extrusion of wood plastic cellular composites and formulation evaluation using compression molding
… cellular structure while reducing the density. Extrusion processing is one of the most economical methods for profile formation. For our study, rectangular profiles were extruded using a twin-screw extrusion system with different grades of HDPE and with varying wood fibre and lubricant contents …
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Foaming of amorphous drug delivery systems prepared by hot melt mixing and extrusion
… academe and pharmaceutical industry in exploring foaming processes and their products in drug delivery applications. However, there is still little knowledge of the impact of the morphology of the foamed structures on the performance of drug products in spite of some publications in this area. …