摘要
采用端氨基液体丁腈橡胶(ATBN)、纳米SiO_2粒子对环氧树脂体系进行增韧,研究了两种增韧剂的加入对树脂体系凝胶时间的影响。结果表明,随着ATBN用量的增加,体系的凝胶时间在同等温度下都明显减小;制备了不同增韧剂添加量的树脂浇注体并对其力学性能进行测试,结果表明,当ATBN的添加量为10份,纳米SiO_2粒子添加量为1.5份时,增韧效果最为明显,与未增韧体系相比,浇注体冲击强度、弯曲强度、拉伸剪切强度分别提高68%,18%,90%;应用差示扫描量热仪进行固化反应活性以及固化产物动力学研究,确定了当ATBN、纳米SiO_2粒子的添加量分别为10份、1.5份时,树脂体系进行固化反应的表观活化能为63.99 kJ/mol,反应级数为0.90;应用增韧后树脂体系制备了复合材料并对其力学性能进行了测试,结果表明增韧后复合材料弯曲强度达到681.82 MPa,比未增韧树脂体系制备的复合材料提高了28%。
Using amine liquid NBR （ATBN） and nano SiO2 to improve the toughness of epoxy resin,the influence of add-ing ATBN on the gel time was investigated. The results show that with the increase of ATBN,the gel time decrease obviously at the same temperature. The cured epoxy resin with different toughening agent was prepared and its mechanical properties was tested. The results indicate that when 10 phrs of ATBN and 1.5 phrs of nano SiO2 is added, the curing system shows the most obvious toughen-ing effect. Compared with the epoxy without ATBN and nano SiO2, the impacted strength, the bending strength and the tensile shear strength of cured epoxy resin are 68%, 18% and 90% higher respectively. Differential scanning calorimetry was utilized to study the curing reaction kinetics of epoxy resin. When the addition of ATBN and nano SiO2 are 10 phrs and 1.5 phrs,the apparent activation energy of the curing reaction is 63.99 kJ/mol, the reaction series is 0.90. The composites with toughed resin were prepared and their mechanical properties were tested. The results show that the bending strength of composite laminate is 681.82 MPa, 28% higher than the composite laminate without ATBN and nano SiO2.
作者
卢亚汝
张森
刘源仁
周影影
Lu Yaru;Zhang Sen;Liu Yuanren;Zhou Yingying(Institute of Material Engineering, Xi’ an Aeronautical University, Xi’ an 710000, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2018年第5期1-5,11,共6页
Engineering Plastics Application
基金
国家自然基金青年基金项目(51701148)
西安航空学院2018年校级科研项目(2018KY1224)
