Synthesis and Properties of Cyanate Ester Containing Siloxane and Imide Groups
|摘要:||本研究合成出含矽氧烷與亞醯胺之氰酸酯V。將商用環氧樹脂Tetraglycidyl meta-xylenediamine ( GA-240 )和含矽氧烷與亞醯胺之氰酸酯V依不同當量比例混合並交聯，由實驗結果來研究氰酸酯V對商用環氧樹脂的改質效果。
The research deals with synthesis of cyanate ester V containing siloxane and imide groups , which was then mixed with a commercial epoxy resin “Tetraglycidyl meta-Xylenediamine (GA-240)”, followed by curing in various equivalent ratios of GA-240/V. Functional group changes during curing reaction were investigated by FT-IR. The curing behavior was studied by dynamic DSC at different rising temperature rate. The curing activation energy of the epoxy resin that containing cyanate ester V was found much lower than the pure epoxy resin , presumably because of the catalysis of tertiary amine in the cyanate ester V. Thermal mechanical properties were measured by TMA and TGA. These cured materials indicate glass transition temperatures ranging from 199℃ to 207℃. On-set of decomposition temperature was found at around 286℃ for the pure GA-240 with improved thermal stability upon incorporation of cyanate ester V. The dielectric constants of the cured materials were in the range of 4.3 to 3.2.
|Appears in Collections:||Thesis|