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Showing 1 to 14 of 14 for “"Reactive Extrusion"”.
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Copolymerisation of polyesters using reactive extrusion
… than commercial PBAT. Upscaling this process in reactive extrusion revealed that a screw configuration constructed with at least 50% kneading blocks is necessary to achieve critical processing parameters, including a minimum residence time of four minutes and an average degree of fill of 0.5. In …
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Improving Impact Properties of Novatein through Polymer Blending and Reactive Extrusion
… adipate-co-terephthalate (PBAT) using twin-screw extrusion to allow for sufficient mixing and residence time for chemical interactions or reactions to form. Materials were characterized for mechanical (tensile and impact testing), thermal (dynamic mechanical analysis and differential scanning …
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Synthesis and characterisation of polyamide 6 blends made by reactive extrusion
… screw and barrel configuration was used during reactive extrusion process to permit necessary feeding, mixing, devolatilising and pumping requirements. Various screw speeds and barrel temperature profiles were also employed to influence the thermal and shear history of the reaction mixture. …
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Rheology of Filled and Unfilled Polyurethanes for Reactive Extrusion-Based Applications
… low viscosity photocurable resins, and material extrusion (MatEx) of thermoplastic or high viscosity composite materials. Because of its ability to reduce material waste while printing complex geometries, AM has the potential to revolutionize the manufacturing industry for a diverse set of …
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3-D numerical simulation of reactive extrusion and its application to polymerization of ε-caprolactone in co-rotating twin-screw extruders
… the screw channels. Finally, a global model for reactive extrusion was proposed, combining the models for the fully-filled screw elements and the partiallyfilled channels. The predicted conversion ratios at the die based on the 3-D model agree well with the experimental results from the …
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Reactive modification and crystallization behavior of foamed poly(butylene terephthalate)
… structure 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 …
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Lactose Polymerization to Polylactose: Furthering Our Understanding for Commercialization
… blend of lactose, glucose and citric acid using reactive extrusion, has been developed in our lab. A benchtop method for polylactose production was developed that allowed for the evaluation of formulation impact on the polymerization reaction and investigation of the use of permeate powder as the …
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Studying the Effect of Zinc 3-(Dibutylamino) Propionate (ZDAP) Additive on Fire Retardant, Mechanical, and Physical Characteristics of Epoxy-Amine Networks
… performance were also assayed. It was found that reactive extrusion can produce low-quality (~80% purity) material that is effective for improving fire performance, but produces brittle material as compared with benchtop-synthesized ZDAP of ~94% purity.</p>
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Reactive modification of polyesters and their blends
… the chemical modification of polyesters by reactive processing a low molecular weight (MW) unsaturated polyester (UP) and a higher MW saturated polyester, polyethylene terephthalate (PET), alone or blended with polypropylene (PP) were melt processed in a batch mixer and continuous twin screw …
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Flow field analysis of some mixing and conveying screw element regions, within a closely intermeshing, co-rotating twin-screw extruder.
… and other modifiers onto polymers by reactive extrusion, has been performed successfully by the Polymer Processing and Performance Group at Aston University. Traditionally the optimum conditions for the grafting process have been established within a Brabender internal mixer. Transfer …
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Reclamation and Reprocessing of Thermotropic Liquid Crystalline Polymer from Composites of Polypropylene Reinforced with Liquid Crystalline Polymer
… composites are produced via a patented, dual extrusion process. This unique process yields a fiber which consists of numerous continuous fibrils of the liquid crystalline polymer encased in a thermoplastic matrix. These fibers have been used to form random mats and woven pre-forms, which have …
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Biopolymer foams from Novatein thermoplastic protein and poly(lactic acid)
… and less harmful compared to maleic anhydride. Reactive extrusion was used to blend different proportions of Novatein and PLA and the compatibilizing effects of itaconic anhydride was examined. Results showed that fewer agglomerated Novatein particles and less phase separation was visible in the …
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Mechanochemical preparation of multi-component pharmaceutical materials for enhanced physicochemical properties
… a continuous manufacturing technique, hot-melt extrusion (HME), to manufacture multi-component systems while removing their intermediate handling.<br/><br/><i>Thesis embargoed until 31 December 2026</i>.
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Radikálové roubování PE/PP kopolymeru
Diplomová práce se zabývá přípravou a charakterizací blokového kopolymeru PP/PE roubovaného anhydridem kyseliny itakonové v tavenině. Teoretická část se zabývá radikálově iniciovaným roubováním polárních monomerů na polyolefiny a využitím roubovaných polyolefinů. V experimentální části byly …