摘要
采用两种环氧树脂、双马来酰亚胺、环氧扩链剂、固化剂、促进剂以及两种增韧剂,研制了系列无溶剂环氧胶粘剂体系,并对其性能进行了综合研究。研究结果表明:(1)4种不同配方的防弹环氧胶粘剂中,JC-4黏度适中,随温度升高而整体下降趋势均匀。当温度达到60℃以上时,黏度在400 mPa·s以内,便于对纤维涂敷。4种配方的环氧胶粘剂反应活性均较高,可在室温下进行固化且不会损伤UHMWPE纤维的性能。(2)4种配方的防弹环氧胶粘剂在中低温区均表现出优异的剪切强度,其中JC-3和JC-4配方的胶粘剂较为优异,在120℃仍具有11 MPa以上的剪切强度,表现出良好的耐高温稳定性,能够满足防弹复合材料对树脂基强度和耐热性基本需求。(3)4种配方的相对介电常数在3.9~4.5之间,均具有良好的介电性能,其中JC-4配方所制的环氧胶粘剂介电常数最低,具有良好的电绝缘性。JC-2、JC-3和JC-4的介电损耗在1.8%以内,表现出较优异的介质损耗稳定性。4种配方的环氧胶粘剂吸水率在0.36%~0.65%之间,均具有优异的疏水性能,其中JC-4配方胶粘剂吸水率最低仅为0.362%。(4)将JC-4配方用作防弹复合材料的胶粘剂,防弹复合材料在射击试验中,未被击穿,背弹面受弹头冲击而凸起,背凸高度为23 mm,能够满足防弹复合材料对胶粘剂的性能要求。
A series of solvent-free epoxy adhesive systems were developed by using two kinds of epoxy resin,bismaleimide,epoxy chain extender,curing agent,accelerator,and two kinds of toughening agent,and their properties were comprehensively studied.The research results showed that,(1)Among the four different formulations of bulletproof epoxy adhesive,JC-4 had a moderate viscosity and a uniform overall downward trend with increasing temperature.When the temperature reached 60℃or above,the viscosity was within 400 mPa·s,which facilitated fiber coating.The four formulations of epoxy adhesive had high reactivity,and could be cured at room temperature without damaging the performance of UHMWPE fiber.(2)The four formulations of bulletproof epoxy adhesive showed excellent shear strength in the medium and low temperature range,among which the adhesive of JC−3 and JC−4 formulations exhibited superior shear strength of over 11 MPa at 120℃,demonstrating good high-temperature stability and meeting the basic requirements of resin based strength and heat resistance for bulletproof composite materials.(3)The relative dielectric constants of the four formulations were between 3.9 and 4.5,all of which had good dielectric properties.Among them,the epoxy adhesive prepared by JC−4 formulation had the lowest dielectric constant and good electrical insulation properties.The dielectric loss of JC-2,JC-3,and JC−4 was within 1.8%,demonstrating excellent stability in dielectric loss.The water absorption rate of the four formulations of epoxy adhesive ranged from 0.36%to 0.65%,all of which had excellent hydrophobic properties.Among them,the JC−4 formulation adhesive had the lowest water absorption rate of only 0.362%.(4)The JC−4 formulation was used as the adhesive for bulletproof composite materials.The bulletproof composite materials were not penetrated during the shooting test,and the back surface was raised by the impact of the bullet,with a height of 23 mm,which could meet the performance requirements of the adhesive for bulle
作者
李亚东
万传松
虞鑫海
Li Yadong;Wan Chuansong;Yu Xinhai(College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China)
出处
《中国胶粘剂》
CAS
2024年第9期41-47,共7页
China Adhesives
关键词
耐高温
环氧树脂胶粘剂
防弹复合材料
胶粘剂性能
heat-resistance
epoxy resin adhesive
bulletproof composite material
adhesive property
