摘要
用双酚AF型环氧树脂(DGEBHF)改性双酚A型氰酸酯(BACY),制备一种新型含氟氰酸酯共聚物,并对比双酚A型环氧树脂(DGEBA)/BACY共聚物研究了其性能。采用凝胶时间和差示扫描量热法分析了DGEBHF对BACY固化性能的影响,结果表明,DGEBHF能有效改善BACY的固化性能。通过冲击强度(σK)和粘接强度(τ)的测试,研究了DGEBHF添加量对DGEBHF/BACY共聚物力学性能的影响,结果表明,共聚物的σK随DGEBHF含量的增加而增大;添加总量15%的DGEBHF时,DGEBHF/BACY粘接强度最大,且相比纯BACY明显提高。介电性能分析可得,DGEBHF会降低BACY的介电性能,但是DGEBHF/BACY的介电性能优于DGEBA/BACY。最后,通过热重分析法分析了DGEBHF对BACY热稳定性的影响,结果发现,DGEBHF会降低BACY的热稳定性,但是DGEBHF/BACY的热稳定性大于DGEBA/BACY。
Bisphenol-AF epoxy resin （DGEBHF） was employed to cure bisphenol-A cyanate resin （BACY）, and a novel fluorinated polycyanurate copolymer was obtained. The properties of DGEBHF/ BACY copolymer were compared with bisphenol-A epoxy resin （DGEBA）/BACY copolymer. The curing characteristics of DGEBHF/BACY was evaluated by gelation time （GT） and differential scanning calorimetry （DSC）. It is found that GT decreases obviously as the DGEBHF concentration increases. The mechanical properties of DGEBHF/BACY were characterized by impact strength （aK） and adhesive strength （r）. The results show that aK is improved as the concentration of DGEBHF increases. The adhesive strength is optimal when the mass ratio of DGEBHF/BACY is 15/85 and improved clearly compared with BACY. According to dielectric analysis, dielectric properties is depressed by DGEBHF, but the dielectric performance of DGEBHF/BACY is more outstanding compared to DGEBA/BACY. Finally, the thermal stability of cured DGEBHF/13ACY was evaluated by therrnogravimetric analysis （TGA）. It is found that the thermal stability of cured DGEBHF/BACY is depressed by DGEBHF, but DGEBHF/BACY is more stable than DGEBA/BACY under the same conditions.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2017年第12期48-52,共5页
Polymer Materials Science & Engineering
基金
国家科技支撑计划(2014BAB15B02)
关键词
氰酸酯
环氧树脂
固化性能
力学性能
介电性能
cyanate resin
epoxy resin
cured properties
mechanical properties
dielectric properties
