A5108246107- Epoxy Resin Curing Processes
- Material Properties and Applications
- Polymer Science and Applications
- Polymer Nanocomposites and Properties
- Synthesis and properties of polymers
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Flame retardant materials and properties
- Polymer crystallization and properties
- Polymer Synthesis and Characterization
- Thermal and Kinetic Analysis
- Injection Molding Process and Properties
- Fiber-reinforced polymer composites
- Photopolymerization techniques and applications
- Polymer Science and PVC
- Mechanical Behavior of Composites
- Tribology and Wear Analysis
- Polymer composites and self-healing
- Silicone and Siloxane Chemistry
- Polymer Nanocomposite Synthesis and Irradiation
- Various Chemistry Research Topics
- Phosphorus compounds and reactions
- Environmental and Industrial Safety
- Phase Change Materials Research
- Nanotechnology research and applications
- biodegradable polymer synthesis and properties
D. Mendeleyev University of Chemical Technology of Russia
2016-2025
Objectives . The aim of this study is to ascertain the influence polyetherimide on curing process epoxy binders. Methods storage modulus and loss epoxyamine systems were measured as a function time Anton Paar MCR 302 rheometer. experiments carried out at an oscillation frequency 1 Hz, with amplitude aligned linear viscoelasticity region, across range temperatures (160, 170, 180°C). crossover point was determined when components complex elasticity are equal according obtained dependencies....
ABSTRACT Efficiency of the application high strength heat resistant thermoplastics for improving fracture toughness and impact properties epoxy resins motivated authors to try large‐scale production same purpose. Epoxy/anhydride systems were modified by up 8 wt % poly(vinyl acetate) (PVAc) 6 butyral) (PVB). In epoxy–PVAc blends it was possible obtain morphologies with continuous thermoplastic phase. However, only sea‐island a very small size PVB‐rich phase observed in epoxy–PVB matrices. The...
With the aim of obtaining halogen-free polybenzoxazazines with reduced flammability, phosphazene-containing benzoxazines (PhBZ) were synthesized in a two-stage method. In first stage reaction hexachlorocycotriphosphazene bisphenol A at molar ratios 1:12, 1:16, and 1:24, respectively, mixtures hydroxyaryloxycyclotriphosphazenes obtained, which mainly contained P3N3[OC6H4C(CH3)3C6H4OH]6. second stage, when these interacted aniline an excess paraformaldehyde toluene 80–90 °C, PhBZ containing...
Abstract The cure of four epoxy‐amine systems was studied by viscometry, dynamic mechanical analysis, and DSC. investigation carried on at temperatures below above the glass transition temperature ( T g ) completely cured products. Viscosity growth in initial stage is described an exponential‐type equation, approach to gel‐point a power law, but exponent did not coincide with universal theoretical scaling‐law value. A viscosity master curve can be constructed if one reduces time their...
Abstract The kinetics of curing several phenolic resin compounds were studied with the use four techniques: viscometry, infrared spectroscopy (IR), differential scanning calorimetry (DSC), and thermomechanical analysis. objective was to compare effectiveness these methods. It found that viscosity increase during oligomer can be described by an exponential function, rate in terms a “viscometric” kinetic constant, k η . gel‐time, t *, extrapolation time dependence reciprocal viscosity. product...
The influence of epoxy active diluents, 1,4-butanediol diglycidyl ether (BD) and furfuryl glycidyl (FUR), in the mixtures with benzoxazine monomer based on bisphenol A, formaldehyde m-toluidine (BA-mt), properties a matrix was disclosed this work. Resins were modified to achieve good tackiness at room temperature reduced viscosity. mono- difunctional modifiers process curing studied by way differential scanning calorimetry oscillatory rheology. addition BD FUR shifted peak higher...
The usual problem of meltable phase-change agents is the instability in their form upon heating, which can be solved by placing them into a continuous polymer matrix. Epoxy resin suitable medium for dispersing molten agents, but it necessary to make obtained droplets stable during curing formed material. This work shows that paraffin wax forms Pickering emulsion an epoxy and presence asphaltenes extracted from heavy crude oil. Theoretical calculations revealed complex equilibrium...
The influence of epoxyphosphazene-modifying additives on the features hot curing process epoxy-amine composition was studied by rotational viscometry method. modification caused an acceleration process, changed rheokinetics viscosity increase, especially stage molecular mass growth linear chains became almost twice shorter for with 30% modifier than unmodified one. We suggest reason these changes is polyfunctionality epoxyphosphazene, which finally results in high-density network formation....
A novel type of phosphazene containing an additive that acts both as a catalyst and flame retardant for benzoxazine binders is presented in this study. The synthesis derivative hexachlorocyclotriphosphazene (HCP) meta-toluidine was carried out the medium latter, which made it possible to achieve complete substitution chlorine atoms initial HCP. Thermal flammability characteristics modified compositions were investigated. modifier catalyzes process curing shifts beginning reaction from 222.0...
The process of curing an epoxyamine composite was investigated by methods dynamic mechanical analysis and rotational viscometry. service characteristics the cured composites depend on are directly related to kinetics change in rheological characteristics.