The rate of reaction is first order with icspect to epoxy group, zero order with respect to methylacrylic acid, and 0.71 order with lespect to quaternary ammonium salt catalyst respectively.

实验证明该反应对环氧基为一级反应，对甲基丙烯酸为零级，对季铵盐是0.71级。

youdao

Four new types of organic siloxane surfactants with quaternary ammonium group have been obtained.

通过多步骤合成了四种含有季铵基的有机硅表面活性剂。

youdao

The preparation and respective characteristics of polysiloxane with polyether, amino, quaternary ammonium, alkyl and so on functional group are summarized.

阐述了带有聚醚基、 氨基、季铵基和烷基等功能基聚硅氧烷的制备方法以及它们各自的特性。

youdao

Together with our colleagues of the INQUA (International Union for Quaternary Research) focus area group on palaeoseismology and active tectonics, IGCP 567 started a new tradition of joint field workshops.

UNESCO: Tales set in Stone: learning from ancient earthquakes