Composites of lead zirconate titanate particles in an epoxy matrix are prepared in the form of 0-3 and quasi 1-3 with different ceramic volume contents from 10% to 50%. Two different processing routes are tested. Firstly a conventional dielectrophoretic structuring is used to induce a chain-like particle configuration, followed by curing the matrix and poling at a high temperature and under a h...

This paper aims at presenting the effects of short-term sustained load and temperature on time-dependent deformation of carbon fiber-reinforced polymer (CFRP) bonded to concrete and pull-off strength at room temperature after the sustained loading period. The approach involves experimental and numerical analysis. Single-lap shear specimens were used to evaluate temperature and short-term sustai...

A new hexaprismane Co(II)6(μ3-OH)6 cluster-based three-dimensional coordination polymer ({Co(μ3-OH)(HCOO)0.72(CH3COO)0.28}n, Co6-CP) was successfully synthesized and characterized with single-crystal XRD, IR spectra, TGA spectra and elemental analysis. Co6-CP was used as an effective heterogeneous catalyst for the aerobic epoxidation of various alkenes. For the catalytic epoxidation of trans-st...

A very convenient one-step synthesis to cross-linked polymeric nanoparticles by conventional radical copolymerization without the addition of stabilizers or surfactants was explored. Moreover, these nanoparticles exhibited excellent stability, activity and selectivity in the cycloaddition reaction of CO(2) to epoxides and could be separated from the products easily and reused.

Epoxy is a versatile resin used in different fields such as coatings, colors, colorants, and composites. Adding nano-scale fillers/additives to the epoxy has valued epoxy coatings for engineering applications, and opened the time of advanced epoxy-based nanocomposite coatings. In the present work, graphene oxide GO was chemically functionalized with starch, as a natural polymer, and added to th...

The concept of self-healing dielectric polymers has been heatedly discussed, with the expectation high damage resistance and longer service time. However, there is still a lack analysis on competitive relationship between electrical degradation self-healing. authors discussed this in two stages: design strategies operation polymers. Since requirements for excellent insulating or mechanical prop...

Abstract Nitrogen‐containing polymers are widely applied materials, including polyamides, polyurethanes, and polyureas as well epoxy thermosets. Their indispensability the urgent need to replace fossil‐based considering more sustainable alternatives lead significant efforts in exploring renewable feedstock potential new building blocks. Being obtained from non‐edible plant parts often occurring...

Terpene epoxides are considered as potential primary intermediates in the synthesis of numerous green polymers including epoxy resins, polycarbonates, nonisocyanate polyurethanes and even some polyamides. In this chapter we describe recent efforts from our group to develop catalytic noncatalytic processes for terpene epoxidation using a variety oxidizing agents process intensification methods. ...

This paper summarizes the results of research in field polymer chemistry on creation new heat-resistant epoxy polymers and composites based resins various functionality, hardeners catalysts chemical structures. Samples organo -, glass- carbon-fiber plastics were manufactured tested using existing technologies with a positive result at enterprises PJSC NPO Iskra, JSC OKB Novator, UNIIKM (corp.)....

The risk of corrosion poses a challenge to meet the stringent reliability requirements microelectronic devices that are used in harsh environments. Microelectronic often encapsulated polymer packaging materials, which protect them from corrosion. These polymers are, however, not completely hermetic and thus allow small amounts ions moisture reach device, might cause circuitry. To improve predic...