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Showing 1 to 20 of 26 for “"cure kinetics"”.
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Development Of Quantitative FT- IR Methods For Analyzing The Cure Kinetics Of Epoxy Resins
… critically depends upon the details of the cure chemistry used to produce the thermoset. In order to better understand and monitor the cure chemistry, quantitative analysis of the FT-IR response has been developed for describing the epoxy-amine curing reaction as well as monitoring the …
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Cure Kinetics and Processing Parameters of Neat and Reinforced High Performance Epoxy Resins: Evaluation of Techniques
… Thermal stability as a function of degree of cure is monitored by thermogravimetric analysis (TGA). The parameters of the general kinetic equations, including activation energy and rate constant, are explained and used to compare results of various techniques. The utilities of the kinetic …
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Investigation of induced thermo-mechanical response and cure kinetics during processing of carbon fiber reinforced plastics.
… that can be understood with a knowledge of cure kinetics, heat transfer, and structural mechanics. During laminate manufacture, reinforcing fibers are impregnated with resin and subjected to catalytic conditions. Under these conditions, the resin transforms from liquid to solid as polymer …
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Cure Kinetics of Two Part Epoxy Resin and the Effect on Characterization of Thermal Barrier Coatings
… during grinding and polishing. The curing kinetics of a slow cure two part epoxy was investigated and the TBC samples were mounted and cured at heating rates of 2, 5, and 10°C/min to 55°C and 70°C. Grinding and polishing procedures simulated industry practices followed by characterization …
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Characterization of Cure Kinetics and Physical Properties of a High Performance, Glass Fiber-Reinforced Epoxy Prepreg and a Novel Fluorine-Modified, Amine-Cured Commercial Epoxy.
… Thermal stability as a function of degree of cure is monitored by thermogravimetric analysis (TGA). The parameters of the general kinetic equations, including activation energy and rate constant, are explained and used to compare results of various techniques. The utilities of the kinetic …
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Analysis of Cyanate Ester Resins and Graphite Fabric for Use in Resin Film Infusion Processing
… systems were characterized to determine their cure-kinetics, and viscosities during cure. A 8HS graphite fabric was tested in compaction and through the thickness permeability. A one-dimensional, through the thickness, flow and cure computer simulation was run. The resin cure-kinetics models …
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Cure characterization and process modeling of soy-based composites
"This work deals with cure characteristics of soy-based resin system, fabrication of pultruded soy-based composites, and analysis of flexible polymeric foams. In the first part of this work, the cure kinetics and rheology of the soy-based resin system were studied. The cure kinetics models of the …
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Effect of carbon nanoparticle addition on epoxy cure
The thesis reports studies of cure kinetics and the glass transition temperature advancements of three commercial epoxy resin systems: MY 750 / HY 5922 (Vantico), MTM 44 -1 (ACG) and 8552 (Hexcel Composites). This investigation was conducted with the utilisation of Differential Scanning Calorimetry …
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Minimizing uncertainty in cure modeling for composites manufacturing
The degree of cure and temperature are consistent variables used in models to describe the state of material behaviour development for a thermoset during cure. Therefore, the validity of a cure kinetics model is an underlying concern when combining several material models to describe a part forming …
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Formulation of uv curable resins utilized in vat photo polymerization for the additive manufacturing of gun propulsion charge in 3d printers
… of the polymer network structure and cure kinetics is essential for a resulting polymer that exhibits good mechanical properties.
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Kinematics of Inter-Ply Interfaces In Composite Manufacturing
… includes new in-situ experimental approaches, cure cycle design, interface modification, and thermomechanical modeling for developing a fundamental understanding of the cure kinetics during composite manufacturing. Strains, ply-movement, and formation of defects are observed in-situ using …
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Multi-stage polymer systems for the autonomic regeneration of large damage volumes
… and initiator-promoter for polymerization. Cure kinetics, chemical and mechanical properties can be tuned by employing different monomer systems. The versatile gelation chemistry gels over 20 vinyl monomers to yield both thermoplastic and thermosetting polymers. The healing efficacy of the …
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Cure of aqueous phenol-formaldehyde resin at elevated water vapor pressures
… knowledge of aqueous phenolformaldehyde resin cure as it is affected by the elevated water vapor pressures that occur during hot-pressing of a wood-based composite. Microdielectric spectroscopy (DEA) was used to monitor the cure reaction, and thermomechanical analysis (TMA), swelling tests and …
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Variable Frequency Microwave Curing of Polyurethane
… (1) whether microwave energy affected the cure rate in a water-based, aliphatic PUR, and (2) if there was an effect of microwave frequency on the cure rate. The primary tool for determining extent of cure in the PUR samples was Fourier transform infrared spectroscopy (FTIR). Using this …
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TI Nano Powder Speckle Pattern Creation and Use in DIC of ZnO Modified Single Carbon Fibers
… interaction, analyzing the thermal behavior and cure kinetics due to increase fiber surface area, and improved strength due to increase in interface friction. The proposed approach is to use HD DIC for mapping the interface by using speckles in nanoscale. The speckle pattern was created with Ti …
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Nonlinear Mechanical and Actuation Characterization of Piezoceramic Fiber Composites
… other related topics, such as manufacturing, cure kinetics modeling and linear thermoelasticity of the Macro Fiber Composite, are covered in the appendices.
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Verification of a Three-Dimensional Resin Film Infusion Process Simulation Model
… through an anisotropic carbon fiber preform, cure kinetics of the resin, and heat transfer within the preform/tool assembly. The computer model can predict the flow front location, resin pressure distribution, and thermal profiles in the modeled part. The formulation for the flow model is …
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Manufacturing of thermosetting polymers and composites using frontal polymerization: A numerical study
… which usually requires the monomer to be cured at high temperatures (around 180oC) for several hours under combined external pressure and internal vacuum. Curing is generally accomplished using large autoclaves or ovens that scale in size with the component. Hence, this traditional curing …
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