色谱/质谱联用技术对乙氧-叔丁氧基硅烷水解-聚合行为的研究

STUDY ON HYDROLYSIS AND POLYMERIZATION BEHAVIOR OF HYBRIDIZEDSILICON ALKOXIDE Si(OEt)x(OBut)4-x BY GASCHROMATOGRAM/MASS SPECTRUM TECHNIQUE

采用色谱／质谱联用技术研究了一种复合硅醇盐：乙氧－叔丁氧基硅烷［Ｓｉ（ＯＥｔ）ｘ（ＯＢｕｔ）４－ｘ］的水解－聚合过程．测定了水解过程不同阶段胶体中各物质的水解行为、空间结构构成以及含量的变化．结果表明：Ｓｉ（ＯＥｔ）（ＯＢｕｔ）３具有高于Ｓｉ（ＯＥｔ）２（ＯＢｕｔ）２的水解速率，随着水解的进行，二聚体和三聚体相继形成．

The hydrolysis and polymerization processes of the hybridized Si(OEt)x(OBut)4-x were investigated by gas chromatogram/mass spectrum technique. The hydrolyzation behaviors,steric configurations and abundance percentage of different hydrolytic products were investigated in detail. The results show that Si(OEt)(OBut)3 is immediately hydrolyzed and its reaction rate is higher than that of Si(OEt)2(OBut)2. Dimers turned up soon after the mixing of Si(OEt)x(OBut)4-x with water, and two kinds of trimers were formed successively.