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SPE Library content related to rheology
Characterization of Novel One-Step Processed FG-PTT
PET, PBT and Poly (trimethylene terephthalate) (PTT), of the polyester resin family, potentially compete for the same engineering-grade thermoplastic market. PTT’s crystallization rate relative to those of PET and PBT, suggests its high suitability for injection molding applications. The aim of this work is to produce a viable PTT candidate for engineering structural applications. To this end, fiberglass (FG) reinforcement, a commonly used method of improving polyester properties, is in a one-step novel process blended with PTT at 10%, 15%, 20%, and 30% FG. The mechanical, rheological, thermal and morphological properties of the FG-PTT composite are presented.
Nanocomposites via sol-gel reaction and nylon polymerization
Combining two common polymerization techniques generates reinforcing particles that increase modulus up to 20%.
Enhancing polyamide properties with alumina whiskers
Short fibers with a different morphology and composition can improve the thermal stability of polyamide composites.
Halloysite nanotubes as reinforcing fillers in polymeric nanocomposites
Modifying the surface of halloysite nanotubes by grafting with an aminosilane increases the dynamic-mechanical properties of the nanocomposite.
High-shear-rate capillary rheology of polystyrene melt
A systematic investigation of the superimposed effects in high-shear-rate capillary flow of polystyrene melt yields the polymer's true shear viscosity curve.
Palm-oil-based unsaturated polyester
The activation energy for synthesizing unsaturated polyester from palm oil using different reactant ratios and catalysts was investigated, along with the solubility and miscibility behavior of the resultant polymer.
Optical performance of gas-assist injection molding
Simulation and experimentation are used to analyze birefringence in objects produced by the gas-assist injection molding process.
Ultrafine rubber particles raise thermoplastic's glass transition temperature
Adding ultrafine full-vulcanized powdered rubber substantially increases a thermoplastic's glass transition temperature, due to the restricted motion of plastic chains at the interface layer.
Key factors affecting processing of natural fiber composites
Processing variables must be considered when replacing synthetic with natural fibers in polymer matrix composites.
Effect of nanosilica on vulcanizates of natural and reclaimed rubber
Adding nanosilica to vulcanizates of natural and reclaimed rubber enhances their reinforcing efficiency, tensile properties, and thermal stability.
Partial carbon black replacement by nanoclay for enhanced crosslinking
The curing reaction of a rubber compound was more efficient with an organoclay-carbon black hybrid filler system.
Evaluating phase inversion during high-impact polystyrene synthesis by means of rheology
Rheological evaluation of relaxation times makes it possible to estimate the occurrence of a crucial switch in phases that determines the final properties of high-impact polystyrene.
Rheological understanding of polymer-filler interactions
Dynamic rheology was used to explore how high density polyethylene interacts with different amounts of fumed silica nanofiller, both with and without the addition of a compatibilizer.
Differentiating structure and stability in high -performance thermoplastics
Melt rheology can probe the molecular-scale structure of several grades of commercially available polyaryletherketones.
Designing water -soluble polymers for enhanced oil recovery
Modifying polyacrylamides with hydrophobic co-monomers containing aryl and alkyl disubstituted acrylamide improves thickening properties and surface activity at the liquid-air interface.
Predicting orientation of long-fiber suspensions
Applying a novel continuum model of semi-flexible fibers demonstrates the potential for improved understanding of long glass fiber behavior in an injection-molded disk.
Determining the aspect ratio of graphene nanocomposites by indirect measurements
The measurement of the engineering properties of nanocomposites provides information about the average degree of graphene filler dispersion.
Predicting layer rearrangement in extrusion
Numerically simulating and predicting viscoelastic materials' secondary flow behaviors could help optimize extruder designs and process parameters.
Optimum dispersion of single-walled nanotubes in epoxy resins
Mechanical and chemical treatment of carbon nanotubes can improve their ability to disperse uniformly in epoxy resins and, as a result, alter the rheological behavior of the composite materials.
Understanding the mechanical and electrical performance of organic solar cells
Molecular dynamics simulations reveal the influence of temperature, chirality, and nanotube radius on the interaction of conjugated polymers and carbon nanotubes.
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