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Showing 1 to 20 of 41 for “"LLDPE"”.
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The Young's modulus of compression-moulded LLDPE-phlogopite composites
Please read the abstract (Synopsis) in the section 00frontof this document
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Wave Propagation and Damage Characterization in Natural Fiber Hemp and LLDPE Composite
… of the hemp and linear low density polyethylene (LLDPE) and determine impact absorbing capability using the above mentioned properties. LLDPE is surface-treated with maleic anhydride grafted polyethylene (MA-g-PE) and sodium hydroxide (NaOH). A melt-mixing process is employed where LLDPE is …
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Ultrasonically Assisted Single Screw Extrusion, Film Blowing and Film Casting of LLDPE/Clay and PA6/Clay Nanocomposites
… on the dispersion of modified clay particles in LLDPE and PA6 matrices and the final properties of nanocomposites. LLDPE and PA6 are two polymers that are widely used in packaging industry. Blown and cast films were manufactured from the prepared nanocomposites. To achieve one step film …
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Oxidation and stabilisation chemistry of metallocene-based polyolefins during melt processing
… catalyzed linear low density polyethylene (m-LLDPE) is a new generation of olefin copolymer. Based on the more recently developed metallocene-type catalysts, m-LLDPE can be synthesized with exactly controlled short chain branches and stereo-regular microstructure. The unique properties of …
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Investigation of the oxidative degradation mechanisms and melt stabilisation of a new generation metallocene polytehylene
… catalysed linear low density polyethylene (m-LLDPE), in order to establish the thermal oxidative degradation mechanism, and secondly, to examine the role of selected commercial stabilisers on the melt stability of the polymers. The unstabilised m-LLDPE polymer was extruded (pass I) using a …
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Controlled Release of Natural Antioxidants from Polymer Food Packaging by Molecular Encapsulation with Cyclodextrins
… into linear low density polyethylene (LLDPE), and (3) measure the release kinetics of inclusion complexes of natural antioxidants from LLDPE into a model food system. Cyclodextrin inclusion complexes of alpha-tocopherol and quercetin were formed by the coprecipitation method and …
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An investigation into the relationship between processing, orientation and properties of low density polyethylene films
… conditions on the mechanical properties of LDPE, LLDPE and blends of LDPE and LLDPE blown films was studied.The results were analysed by relating the change in mechanical properties with the change in the residual strain of manufactured film. The residual strain was measured by using a shrinkage …
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Mechanism and Application of a Heterogeneous Catalytic Hydrogen-deuterium Exchange Reaction for Polyolefins
… a metallocene linear low density polyethylene (LLDPE). When mixed at 170 ºC with isooctane, Pt/Re-SiO2 catalyst, and gaseous deuterium, the polyolefins dissolve and undergo H/D exchange reaction at the surface of the catalyst, producing partially deuterium labelled polyolefins. Polymers with …
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The flow stability of linear low-density polyethlene at polymer and metal interfaces
… fracture in linear low-density polyethylene (LLDPE) were identified using fluoro-elastomer (FE) as a blending additive and as a die coating in two visualization dies. A visualization die was constructed so that subsequent experiments examining the joining flow behavior of two stratified flows …
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Characterization and optimization of polyethylene blends
… a conventional linear low-density polyethylene (LLDPE) or a metallocene-catalyzed LLDPE. A two-step isothermal annealing (TSIA) procedure is developed enabling the satisfactorily resolution of endothermic peaks of blends of low-density polyethylene with LLDPE using standard thermoanalytical …
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Self-Consistency of the Lauritzen-Hoffman and Strobl Models of Polymer Crystallization Evaluated for Poly(ε-caprolactone) Fractions and Effect of Composition on the Phenomenon of Concurrent Crystallization in Polyethylene Blends
… Metallocene-catalyzed linear low-density (m-LLDPE with 3.4 mol% 1-octene) and conventional low-density (LDPE) polyethylene blends of different compositions were investigated for their melt-state miscibility and concurrent crystallization tendency. Differential scanning calorimetric studies …
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Comparison of shear strength properties of textured polyethylene geomembrane interfaces in landfill liner systems
… and textured low linear density polyethylene (LLDPE) geomembranes sheared against different geosynthetics; geotextiles, geogrid and geosynthetic clay liners (GCLs), typically used in South African landfill base liners and capping systems. Tests were performed using a modified 305 x 305 mm x 100 …
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Hemocompatibility of polymeric materials for blood-contacting applications
… (ePTFE), linear low-density polyethylene (LLDPE) and polyethylene terephthalate (PET); 3 potential materials for blood-contacting applications. The surface morphology was characterized using scanning electron microscopy (SEM), and surface wettability was characterized using contact angle …
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The Role of Branching Topology on Rheological Properties and its Effect on Film-Casting Performance
… from a linear low density polyethylene, LLDPE, based series of PE resins to a high density polyethylene, HDPE, based series of PE resins, each with materials of varying degrees of sparse LCB. Evaluation of the shear step-strain rheology for the series of LLDPE-based PE resins allows for …
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Flow of viscoelastic fluids through banks of cylinders: an experimental and numerical investigation
… were fit to the steady shear viscosity of a LLDPE melt and a LDPE melt. The PTT and RS models were also fit to uniaxial extensional stress growth data for each melt. The predictions of the pressure drop by means of the finite element calculations and a capillary model based on Darcys Law were …
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THE RELEASE OF CONTAMINANTS BY LEACHING FROM BOIL-IN BAG LAMINATES
… more detailed, analysis. Global migration of LLDPE films and laminates into fatty-food simulants gave values of ~20 mg dnr^. Flocculent precipitates were clearly visible in the oil extracts and were postulated to be the cause of the high migration result. Calcium stearate and low molecular …
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Nanocomposites: Incorporation of Cellulose Nanocrystals into Polymers and Addition of Zwitterionic Functionality
… (HDPE) and linear low-density polyethylene (LLDPE) samples, respectively, containing well-dispersed CNCs as filler materials. Chapter 2 provided important information on the attachment of catalyst 1 to cellulose nanocrystals and the successful polymerization of ethylene from the cellulose …
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Thermorheology and processing of polyethylene blends : macromolecular structure effects
… of a number of linear low-density polyethylene(LLDPE)/low-density polyethylene (LDPE) blends was studied with emphasis on the effects of long chain branching. First, a linear low-density polyethylene (LL3001.32) was blended with four LDPE's having distinctly different molecular weights. At high …
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Plasma-Enhanced Continuous Carbon Fibre-Reinforced Composites Manufactured from Recycled Thermoplastics
… (PP) and PA6/linear low-density polyethylene (LLDPE). A die, consisting of a slot channel with a series of crests, was developed in this thesis to impregnate CF tows with thermoplastic blends. Static and crest pressure in the die facilitated a high degree of impregnation at manufacturing speeds …
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