Non-Flammable Epoxy Composition Based on Epoxy Resin DER-331 and 4-(β-Carboxyethenyl)phenoxy-phenoxycyclotriphosphazenes with Increased Adhesion to Metals

Sci, Journal Year: 2024, Volume and Issue: 6(2), P. 30 - 30

Published: May 23, 2024

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 spectrometry, properties determined DSC TGA methods. Molecular modeling MM2 method showed that CPPPs are nanosized diameters spheres described around molecules in range 1.34–1.93 nm, which allows them classified structures. The epoxy resin DER-331 cured CPPP, conversion groups assessed IR spectroscopy. Using optical interferometry, it shown well compatible temperature from 80 130 °C. It established composition resistant, successfully passed UL-94 vertical combustion test due formation porous coke during process also had high heat resistance stability (decomposition onset about 300 °C, glass transition 230 °C). has low water absorption, fresh salt water, strength steel aluminum (11 ± 0.2 MPa), makes promising for use an gluing parts shipbuilding automotive industries, aviation industry, radio electronics.

Language: Английский

Improvement of Concrete Durability and Strength with Epoxy Resin Concrete

European Journal of Theoretical and Applied Sciences, Journal Year: 2024, Volume and Issue: 2(6), P. 689 - 699

Published: Nov. 1, 2024

Portland cement concrete has wide applications in construction owing to its good strength and relatively low cost. However, exposure extreme environmental conditions many significant drawbacks. Cracking due mechanical stresses, chemical degradations, fluctuations temperature accelerate the deterioration of by way loss increased permeability. One promising solution for these challenges is Epoxy Resin Concrete. ERC uses epoxy resins as binders, which increase properties significantly. The high adhesive power, permeability, excellent resistance create a highly cross-linked structure that significantly improves toughness durability concrete. Consequently, several superior conventional concrete, such compressive strength, flexural crack resistance. It suits demanding environments, like marine structures, industrial floors, road engineering. Enhanced performance will be relevant increasing safety infrastructure subjected severe conditions. This paper explores advantages potential offer more durable resilient modern construction.

Language: Английский