苯基含氢硅树脂的制备及固化性能研究

以苯基三甲氧基硅烷(Phenyltrimethoxysilane,PTMS)、1,1,3,3-四甲基二硅氧烷(1,1,3,3-Tetramethyldisiloxane,HTMS)和六甲基二硅氧烷(Hexamethyldisiloxane,HMDSO)为主要原料,酸性阳离子交换树脂为催化剂,采用水解缩聚的方法制备了苯基含氢硅树脂(Hydrogen containing phenyl silicone resin,PHMT树脂),采用傅里叶转换红外线光谱(Fourier Transform Infrared Spectroscopy,FTIS)和核磁共振氢谱(1H Nuclear Magnetic Resonance Spectroscopy,1HNMR)对其结构进行了表征,并对其制备工艺、固化性能进行了研究.结果表明,甲氧基的水解程度达99.9%,但羟基缩聚不完全,其残留量约为质量分数0.57%.采用含氢量为体积分数0.37%,黏度为722 mPa·s的苯基含氢硅树脂为交联剂,其固化物机械性能较好.

Study of the preparation and curing property of the hydrogen containing phenyl silicone resin

Hydrogen containing phenyl silicone resin was prepared through hydrolysis polycondensation process , by using phenyltrimethoxyl silane , tetramethyldisiloxane and hexamethyl disiloxane as start ma-terial , and acidic cation exchange resin as catlyst .The structure of the polymer was characterized through Fourier Transform Infrared Spectroscopy （ FTIS ） and 1H Nuclear Magnetic Resonance Spectroscopy （1HNMR）, and the preparation process and the curing properties were also studied .The results showed that the hydrolysis extent of the methoxyl reached 99.9%, but the polycondensation of Si-OH was not complete, and the residue was about 0.57%.The cured polymer had better mechnical performance when used the silicone resin with moderate hydrogen content , 0.37%, and with moderate viscosity , 722 mPa·s.