摘要
制备了环氧树脂和液体端羟基丁腈橡胶改性双酚A型氰酸酯胶粘剂,采用红外光谱、DSC、TGA及DMA研究了催化剂二丁基二月桂酸锡对胶粘剂固化行为、固化产物结构、耐热性和力学性能的影响。结果表明,加入催化剂后该胶粘剂在140℃下固化度为88.7%;固化物T g达到199.4℃,失重5%的温度(T d5)为344.7℃;25℃、150℃和200℃的剪切强度分别为29.4 MPa、27.7 MPa和20.0 MPa,150℃和200℃的强度保持率高达94.2%和68.0%。该胶储存稳定,25℃下放置50 d后仍具有良好常温及高温力学强度。
The epoxy and hydroxyl - terminated liquid nitrile rubber - modified bisphenol A cyanate ester adhesives was prepared. The effects of catalyst dibutyhin dilaurate on the adhesive curing behavior, curing product structure, heat resistance and mechanical properties were investigated by FT- IR, DSC, TGA and DMA. The results showed that the curing degree at 140 ℃ of cyanate ester adhesive adding catalyst was 88.7%. The Tg of cured product reached 199.4 ℃ and 5% weight loss temperature （ Td5 ） was 344. 7 ℃. The shear strength at 25 ℃, 150 ℃ and 200 ℃ was 29.4 MPa, 27.7 MPa and 20. 0 MPa, respectively and the strength retention rate at 150 ℃ and 200 ℃ was 94.2% and 68.0% , respectively. The adhesives had storage stability and still had good mechanical strength at room temperature and high temperature after placed at 25 ℃ for 50 d.
出处
《热固性树脂》
CAS
CSCD
北大核心
2013年第5期36-40,共5页
Thermosetting Resin
关键词
氰酸酯
胶粘剂
二丁基二月桂酸锡
中温固化
耐热性
剪切强度
cyanate ester
adhesive
dibutyltin dilaurate
moderate temperature curing
heat resistance
shear strength
