Development of new high-performance epoxy adhesive for bulletproof
Four types of epoxy adhesive systems were prepared by using two types of epoxy resin(multifunctional epoxy resin SINEP E80,epoxy resin SRTEM-50),polysulfone resin(SE3940),epoxy chain extender,etc.,adding various epoxy toughening agents,and then adding curing agents and accelerators,and their properties were comprehensively analyzed.The research results showed that,(1)Among the four types of epoxy adhesive with different toughening agent ratios,PEJ-3 had moderate viscosity,making it easy to coat onto fibers,and had a lower apparent activation energy and faster curing reaction rate.(2)The capacitance of the four formulations of epoxy adhesive slowly decreased with increasing frequency,among which the capacitance of PEJ-2,PEJ-3,and PEJ-4 formulations of adhesive was between 4.6 and 5.4,all of which had good capacitance stability.The dielectric loss of four types of epoxy adhesive with different toughening agent ratios increased with frequency.Under an external electric field,the four formulations exhibited good electrical insulation performance.(3)The four formulations of epoxy adhesive exhibited excellent shear performance in the medium to low temperature range.Among them,PEJ-3 could still maintain high tensile shear strength within the testing range of-60 to 190℃.This formulation had good bonding strength and high and low temperature resistance,which could meet the basic requirements of resin-based strength and heat resistance of bulletproof composite materials.(4)The water absorption rates of four formulations all demonstrated good hydrophobicity,ranging from 0.20%to 0.60%.This characteristic made it widely applicable in situations where waterproofing and moisture resistance were required.(5)The PEJ-3 formulation composite material had an adhesive content of 37.4%and was not penetrated during the shooting test.The depression depth was only 18 mm,which was less than the standard 25 mm,indicating that the epoxy adhesive and fiber resin composite process could develop bulletproof composite materials with excellent comprehensive performance.
万方数据
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