A5062731269- Epoxy Resin Curing Processes
- Material Properties and Applications
- Polymer Science and Applications
- Synthesis and properties of polymers
- Photopolymerization techniques and applications
- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- Electrochemical Analysis and Applications
- Corrosion Behavior and Inhibition
- Polymer Nanocomposite Synthesis and Irradiation
- Fiber-reinforced polymer composites
- Advanced Polymer Synthesis and Characterization
- Additive Manufacturing and 3D Printing Technologies
- Ionic liquids properties and applications
- biodegradable polymer synthesis and properties
- Metal and Thin Film Mechanics
- Flame retardant materials and properties
- Graphite, nuclear technology, radiation studies
- Microplastics and Plastic Pollution
- Analytical Chemistry and Sensors
- Material Properties and Failure Mechanisms
- Silicone and Siloxane Chemistry
- Injection Molding Process and Properties
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Natural Fiber Reinforced Composites
Frumkin Institute of Physical Chemistry and Electrochemistry
2016-2025
Russian Academy of Sciences
2010
Functional cyclophosphazenes have proven to be effective modifiers of polymer materials, significantly improving their performance properties, such as adhesive characteristics, mechanical strength, thermal stability, fire resistance, etc. In this study, 4-(β-carboxyethenyl)phenoxy-phenoxycyclotriphosphazenes (CPPP) were obtained by the condensation 4-formylphenoxy-phenoxycyclotriphosphazene with malonic acid. Its structure was studied using 31P, 1H, and 13C NMR spectroscopy MALDI-TOF mass...
Low-temperature properties of high-density polyethylene (HDPE), low-density (LDPE), linear (LLDPE), and their blends were studied. The analyzed low-temperature mechanical involve the deformation resistance impact strength characteristics. HDPE is a bimodal ethylene/1-hexene copolymer; LDPE branched ethylene homopolymer containing short-chain branches different length; LLDPE binary ethylene/1-butene copolymer an ethylene/1-butene/1-hexene terpolymer. samples copolymers studied by gel...
In this work, the fracture mechanism of winding carbon-fiber-reinforced plastics (CFRPs) based on epoxy matrices reinforced by polysulfone film was investigated. Two types polymer were used: oligomer (EO) cured iso-methyltetrahydrophthalic anhydride (iso-MTHPA), and EO-modified (PSU) with active diluent furfuryl glycidyl ether (FGE) iso-MTHPA. At stage, reinforcing placed in middle layer CFRP. The toughness GIR obtained CFRP determined double-cantilever beam delamination method....
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...
The method of optical wedge revealed that the optimum temperature for compatibility hexakis(4-acetamidophenoxy)cyclotriphosphazene (ACP) and DER-331 epoxy resin is in range 220–260 °C. interdiffusion time components at these temperatures about 30 min. TGA differential scanning calorimetry (DSC) methods curing 280 °С this composition. IR spectroscopy confirmed reaction between ACP completed within 10 According to DSC data, a glass transition 130 was estimated cured resin. Combustion test...
The mutual solubility of epoxy oligomer with polysulfone (PSU) and polyethersulfone (PES) was studied by optical interferometry. Additionally, phase diagrams (PDs) were plotted their evolution during the curing process shown. structures modified hardened systems, as well tensile strengths, elastic moduli, crack resistance, have been scanning electron microscopy physico-mechanical techniques. effect initial components’ on structure and, subsequently, properties composite material is...
Preparation of hydrophobic coatings is still a challenge for researchers in various fields science. One the easiest ways consists use special modifiers. However, usually such modifiers are poorly compatible with organic polymeric matrixes, which leads to segregation and deterioration coating properties. In this work, we have synthesized number organosilicon copolymers studied their compatibility epoxy matrix efficiency. It was shown that increase phenyl-containing units but decreases...
To reveal the effect of chlorine substituents in ring aromatic amine on synthesis process benzoxazine monomer and its polymerization ability, as well to develop a fire-resistant material, previously unreported based 3,3′-dichloro-4,4′-diaminodiphenylmethane was obtained toluene mixture toluene/isopropanol. The resulting monomers were thermally cured for 2 h at 180 °C, 4 200 220 °C. A comparison between rheological, thermal properties benzoxazines and, reference, 4,4′-diaminodimethylmethane...
We prepared a series of thermally remendable and recyclable polyurethanes crosslinked via reversible furan-maleimide Diels–Alder reaction based on TDI end-caped branched Voranol 3138 terminated with difurfurylamine 4,4′-bis(maleimido)diphenylmethane (BMI). showed that Young modulus strongly depends BMI content (from 8 to 250 MPa) allows us obtain materials different elasticity as simple varying content. The ability DA retro-DA reactions between furan maleimide reversibly bind material...
Composites of polylactide containing graphite nanoplates as a filler in the concentration range 1–20 wt% were prepared methylene chloride using sonication technique. The thermal characteristics and phase transitions studied by DSC TGA methods. temperatures heats glass transition, crystallization, melting determined, degree crystallinity during primary secondary heating was calculated. It is shown that introduction leads to an increase elastic modulus decrease breaking stress elongation at...
An epoxy resin modified with polysulfone (PSU) and active diluent furfuryl glycidyl ether (FGE) was studied. Triethanolaminotitanate (TEAT) iso-methyltetrahydrophthalic anhydride (iso-MTHPA) were used as curing agents. It is shown that during the of initially homogeneous mixtures, heterogeneous structures are formed. The type these depends on concentration hardener. physico-mechanical properties hybrid matrices determined by structure maximum resistance to a growing crack provided...
The film binary composites polylactide (PLA)–chitosan and poly(3-hydroxybutyrate) (PHB)–chitosan have been fabricated their functional characteristics, such as hydrolysis resistance, biodegradation in soil, ion sorption behavior explored. It was established that temperature acidity of solutions are differently affected by the weight loss these two systems. Thus, HCl aqueous solutions, stability PHB-chitosan is higher than PLA-chitosan one, while opposite situation observed for soil. capacity...
Qualitative and quantitative aspects of the formation various types phase structures, sizes compositions were considered. For studied polycaprolactone–epoxy resin/4,4′-diaminediphenylsulfone system, a diagram characterized by amorphous separation with lower critical solution temperature was constructed its evolution traced increasing conversion degree epoxy groups. A method is proposed for determining temperature–concentration parameters that determine type structure composite materials,...