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Showing 1 to 19 of 19 for “"melt compounding"”.
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Improving the Exfoliation of Layered Silicate in a Poly(ethylene terephthalate) Matrix Using Supercritical Carbon Dioxide
… PET-layered silicate nanocomposite produced from melt compounding. Layered silicate and scCO2 were allowed to mix for a period of time before being released into the second stage of a single screw extruder. The rapid expansion forced silicate particles into a modified hopper containing neat PET …
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Chain Extension of Polyamide-6 & Polyamide-6/Organoclay Nanocomposites. Control of thermal degradation of polyamide-6/organoclay nanocomposites during extrusion using a novel chain extender
… layered silicates) nanocomposites during melt compounding have been investigated. In this research, a novel chain extender (Joncryl ADR 3400) has been used to improve thermal stability of PA-6 and PA- 6/organoclay nanocomposites during melt compounding. The materials were compounded using …
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Controlling Cocontinuous Polymer Blends with Nanofillers Jammed at the Interface
… networks. They can be created by either melt compounding of immiscible polymers or phase separation of partially miscible polymer pairs via spinodal decomposition. The polymer blends with cocontinuous structure have significantly improved mechanical properties and they have applications …
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Process for Improving the Exfoliation and Dispersion of Nanoclay Particles into Polymer Matrices Using Supercritical Carbon Dioxide
… of the clay into a stream of polypropylene (PP) melt within the extruder. This CO₂ method was evaluated and compared to other conventional processing techniques. It was observed that the conventional direct-melt compounding methods, with and without the direct injection of CO₂, did not show much …
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Development and characterization of treated kaolin filled polypropylene/kaolin nanocomposites
… in polypropylene/kaolin (PP/K) nanocomposite by melt compounding process in order to improve its mechanical and thermal properties for industrial applications. The surface treatments of micron sized Malaysian kaolin were conducted to produce nano sized kaolin by acidification of kaolin fillers …
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Development of masterbatches for poly (ethylene terephthalate) with improved resistance to CO2 permeation
… metal phosphonates (DLMP) were produced by melt compounding and evaluated. In the case of polyamide based nanocomposites PA6 was found to produce the best dispersed nanocomposites followed by PA-MXD6, PA-6I/6T and PA-6-3-T. It was concluded from the results that surfactant/polymer …
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Carbon-based polymer nanocomposites for 3D-printing
… into two different processing routes: (i) melt compounding and compression molding, and (ii) melt compounding, following by filament extrusion, and fused deposition modelling (FDM). Several characterization techniques were employed in order to evaluate the flowablity, morphology, mechanical …
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Towards Mechanical Reinforcement in Polymer Layered Silicates Nanocomposites of the Second Generation
… The synthetic Na-fluorohectorite was prepared by melt synthesis in a well optimized process at the Department of Inorganic Chemistry I. This material has huge lateral extension (>20 μm) and superb layer charge homogeneity. In order to maximize the aspect ratio (α) the nanoplatelets were exfoliated …
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Advanced Thermoplastic Nanocomposite Melt Processing Using an Improved Supercritical Carbon Dioxide Pretreatment for the Nanomaterial
… use of supercritical carbon dioxide (scCO2) with melt compounding have been investigated to overcome these issues. The focus of this work is on developing the scCO2 treatment of nanomaterial for thermoplastic nanocomposite generation. First, the supercritical carbon dioxide aided melt blending …
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Development and characterization of electrically conductive thermoplastic based composite materials for fuel cell bipolar plates
… (TPU). The composites were prepared using the melt-compounding technique in a twin-screw extruder. Thermogravimetric Analyzer (TGA), Differential Scanning Calorimetry (DSC), Digital microscope, and Scanning Electron Microscope (SEM) were used for thermal and morphological characterization. The …
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Polylactic Acid based Blends and Composites for Material Extrusion 3D Printing: Formulation, Characterization, and Processing
… the processing method used (solvent casting or melt compounding). More importantly, CNC-g-ECO demonstrated enhanced thermal stability and completely mitigated discoloration and thermal aging, which are common issues in CNC-based composites. Finally, this thesis investigated the effects of CNC …
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Exploration of plastic pallets using various fillers on graphite nanoplatelets/polypropylene composites
… by comparison of two mixing methods: physical melt compounding (PMC) and chemical pretreatment compounding (CPC) processes. Incorporation of the GnP into PP resulted in a significant enhancement in the mechanical strength (tensile, impact, and flexural strength) and thermal decomposition …
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Supercritical Carbon Dioxide Processing Of Nano - Clays And Polymer/clay Nanocomposites
… polystyrene/clay nanocomposites compared to melt compounding and solution blended benchmarks. There was a three-fold reduction in the number of tactoids in the scCO2 samples compared to solution blended benchmark that was independent of the clay modifier used leading to an increase in the …
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Micro- and Nanostructured Polymeric Materials for art protection and Restoration
… paintings (Aquazol 200 and 500). In particular, melt-compounded Paraloid and Aquazol based microcomposites with various amounts (5÷30 wt%) of CMC and thin films of Aquazol 500 micro- and nanocomposites produced by the solution mixing method with a CMC and CNC content of 5-10-30 wt% were …
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Understanding the effect of nanofillers on the properties of polypropylene and glass fiber/polypropylene multiscale composites
… properties, the samples were produced by (i) melt compounding and compression molding and (ii) extrusion and injection molding. It was found that injection molding provides significantly greater stiffness and strength compared to compression molding for all types of PP nanocomposites. Several …
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Mg-Al Layered Double Hydroxide: A Potential Nanofiller and Flame-Retardant for Polyethylene
… size. PE/LDH nanocomposites were prepared by melt-compounding method using a co-rotating tightly intermeshed twin-screw extruder and the morphological, mechanical and flammability properties of the nanocomposites were investigated in details. The X-ray diffraction analysis and electron …
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Processing, structure and thermo-mechanical properties of reclaimed nanoclay, and its application in polyamide 6 and low-density polyethylene nanocomposites.
… were manufactured through the process of melt compounding, followed by injection and compression moulding, with different amounts (wt%) of OBM fillers (OBMFs). The study on thermal degradation of LDPE/OBM slurry shows that the nanocomposites with higher percentage filler contents (in case …
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Viscoelastic and fracture behaviour of polyolefin based nanocomposites
… of LLDPE based composites, prepared through a melt compounding process. Different typologies of silica filler have been considered : hydrophilic and hydrophobic fumed silica nanoparticles with different surface area, precipitated silica microparticles, and silica glass microbeads. In this way …
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Processing-driven structuring of melt compounded polymer-based systems
L'abstract è presente nell'allegato / the abstract is in the attachment