聚硼硅氮烷固化氰酸酯基耐高温胶粘剂的制备与性能研究  

Preparation and properties of high-temperature resistant cyanate ester adhesive with polyborosilazane as curing agent

作　　者：崔久红 刘丹[2] 何天琦 罗永明[2] 徐彩虹[2,3] Cui Jiuhong;Liu Dan;He Tianqi;Luo Yongming;Xu Caihong(Research Institute of Aerospace Special Materials and Processing Technology,Beijing 100074,China;Institute of Chemistry Chinese Academy of Sciences,Beijing 100190,China;School of Chemistry and Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]航天特种材料及工艺技术研究所,北京100074 [2]中国科学院化学研究所,北京100190 [3]中国科学院大学化学与化工学院,北京100049

出　　处：《中国胶粘剂》2023年第7期52-56,共5页China Adhesives

摘　　要：以氰酸酯为基胶,聚硼硅氮烷前驱体为固化剂,复配相应的填料,制备了氰酸酯基耐高温胶粘剂。研究了聚硼硅氮烷用量对氰酸酯固化特性、固化产物的结构变化及固化物热稳定性的影响。研究结果表明:与传统的氰酸酯胶粘剂相比,聚硼硅氮烷催化氰酸酯的固化温度降低了50~100℃;聚硼硅氮烷可以催化氰酸酯在150℃低温固化,20份聚硼硅氮烷催化氰酸酯固化物T_(5%)最高达到476.3℃。以此为基础制备的耐高温胶粘剂的室温粘接强度最高为16 MPa,400℃老化3 h后粘接强度仍达到12 MPa,表明该胶粘剂具有较好的粘接性能和耐老化性能。本研究制备的胶粘剂凭借较低的固化温度、良好的粘接性能和耐温性,有望用于航空、航天和电子等行业。A cyanate ester-based high-temperature resistant adhesive was prepared by using cyanate ester as the matrix resin and polyborosilazane precursor as the curing agent,compounding with corresponding fillers.The effect of polyborosilazane dosage on the curing characteristics of cyanate ester,structural changes of cured product,and thermal stability of cured product was studied.The research results showed that compared with traditional cyanate ester adhesive,the curing temperature of cyanate ester catalyzed by polyborosilazane was reduced by 50-100℃.Polyborosilazane could catalyze the low-temperature curing of cyanate ester at 150℃,and T_(5%)of cyanate ester cured product catalyzed by 20 parts of polyborosilazane reached a maximum of 476.3℃.The highest room temperature bonding strength of the high-temperature resistant adhesive prepared on this basis was 16 MPa.After aging at 400℃for 3 hours,the bonding strength still reached 12 MPa,indicating that the adhesive had good bonding and aging resistance properties.The adhesive prepared in this study had the potential to be used in industries such as aviation,aerospace,and electronics due to its low curing temperature,good bonding performance,and temperature resistance.

关 键 词：胶粘剂 氰酸酯 聚硼硅氮烷 耐高温 固化剂 

分 类 号：TQ433.4[化学工程]