邻位含硅芳炔树脂的合成与性能研究

Synthesis and performance study of poly (dimethylsilyene o-diethynylbenzene) resin

以1,2-二溴苯与2-甲基-3-丁炔-2-醇为原料通过Sonogashira反应合成了1,2-二乙炔基苯,并进一步通过格氏反应合成了邻位含硅芳炔树脂(o-PSA),用~1H-NMR、FT-IR、DSC、TGA等分析手段对o-PSA树脂的结构与性能进行了表征。结果表明,o-PSA树脂室温下是粘稠的液体,能溶解于常用有机溶剂,可在160℃左右固化,且固化放热量低。树脂具有优异的加工性,适用于RTM成型,树脂固化物具有优良的耐热性和介电性能。

The 1,2-diethynylbenzene was synthesized by the Sonogashira reaction of 1,2-dibromobenzene with 2-methyl-3-butyn- 2-ol and then the product was used to produce poly（dimethylsilyene o-diethynylbenzene） （o-PSA） resin through Grignard reaction. The structures and properties of o-PSA resin were characterized by 1H NMR, FT-IR, DSC, TGA and so on. The results showed that the o-PSA resin was a viscous liquid at room temperature and was soluble in common solvents. The resin could be cured at 160 ℃ and had low heat release. The resin had good process ability and was suitable for RTM. The cured product had high heat resistance and good dielectric properties.