厌氧胶局部浸渗技术

论述了厌氧胶局部浸渗的原理，介绍了局部浸渗专用厌氧胶ＺＹＳ１及其浸渗工艺，讨论了浸渗密封失效的原因。

聚氨酯甲基丙烯酸酯预聚物合成及反应动力学研究

以甲苯二异氰酸酯(TDI)、PEG1000和甲基丙烯酸-β-羟乙酯(HEMA)为原料,通过分步法合成聚氨酯甲基丙烯酸酯(PUMA)预聚物并对合成工艺及动力学参数进行了研究,确认TDI与PEG、TDI聚氨酯中间体与HEMA这2步反应均为二级反应,反应活化能分别为34.533kJ/mol、87.471kJ/mol;这2步反应的最佳反应温度为65℃、70℃,其相应的反应速率常数分别为2.578×10-3-2L/(mol·s)L/(mol·s)、2.1889×10。

耐高温可拆卸螺纹锁紧粘合剂的研制

本文介绍了一种耐高温可拆卸螺纹锁紧粘合剂,该粘合剂由聚硅氧烷(耐热分子骨架)、有机氟树脂(软化剂)、甲基丙烯酸酯等构成的厌氧粘合剂,主要用于螺纹和套管的粘接以及法兰盘面的密封。

Effect of organic acid during the fermentation of vegetable

The technology of anaerobic digestion of sewage and solid wastes regains people＇s attention, mainly due to high price of fossil fuel nowadays in most recent years. The main topic for batch test is to study the inhibitory effect and boundary conditions of organic acid （propionic acid） to anaerobic digesters. High concentrations ofpropionic acid are achieved by direct dosage of the acid. As it is thought to be highly inhibitory to the digester, we are expecting that： （1） the production rate of methane declines and finally stops when the acid gradually accumulates; （2） the propionic acid will displace stronger inhibition under lower pH values. The results of the batch tests will assist engineers to better control anaerobic digesters and react to potential digester crises caused by propionic acid before it is too late.