Like silanes they have four functional groups, but where silanes have only one pendant organic functional Y group, titanates have three, providing more effective coupling to the resin.

• 象硅烷一样，钛酸酯有四个官能团，但是硅烷只有一个悬挂的有机官能团Y，钛酸酯有三个，从而提供与树脂更有效的偶联。