Global ETD Search
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 5 of 5 for “"melt fracture"”.
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The flow stability of linear low-density polyethlene at polymer and metal interfaces
… of the single component instability of surface melt fracture on the interface behavior in stratified bicomponent flow has been examined. First, the factors and conditions leading to the onset of surface melt fracture in linear low-density polyethylene (LLDPE) were identified using …
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Flow Behavior of Sparsely Branched Metallocene-Catalyzed Polyethylenes
… and extensional rheological properties, the melt fracture behavior, and the ability to accurately predict the flow through an abrupt 4:1 contraction geometry. The effects that sparse long-chain branching (M<sub>branch</sub> > M<sub>c</sub>) has on the shear and extensional rheological …
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Capillary rheometry of soy isolate dough
… doughs are discussed including yield stresses, melt fracture and sample reservoir pressure losses.
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Thermorheology and processing of polyethylene blends : macromolecular structure effects
… weights. At high LDPE weight fractions, DSC melting thermograms have shown three different polymer phases; two for the pure components and a third melting peak of co-crystals. Different rheological techniques were used to check the thermo rheological behavior of all blends in the melt state …
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Investigation of the oxidative degradation mechanisms and melt stabilisation of a new generation metallocene polytehylene
… role of selected commercial stabilisers on the melt stability of the polymers. The unstabilised m-LLDPE polymer was extruded (pass I) using a twin screw extruder, at different temperatures (210-285°C) and screw speeds (50-20rpm) and was subjected to multiple extrusions (passes, 2-5) carried out …