查询词典 PESA

Furthermore,the dispersivity of PESA could be further enhanced by combination with other inorganic or organic...

对PESA与其他几种分散剂进行复配，其中加入与碳酸钙的质量比为1.8%的PESA、0.7%的六偏磷酸钠和0.1%的十二烷基硫酸钠3元复配的分散性能和稳定性最佳。

In this study, effect of initiator, pH, temperature and time on products showed that different relative molecular weight were obtained by means of changing these factors. The standard method was used to study the connection between the scale inhibition and the relative molecular weight of PESA.

通过对PESA聚合过程的研究，找到了影响PESA相对分子质量的关键因素，得出了通过调节引发剂的添加量、改变反应温度等控制PESA相对分子质量及其分布的方法，制备了相对分子质量从400～1200的PESA。

It has been studied the relation between synthesis of polyepoxysuccinic acid and control of molecular weight ,the relation between molecular weight of PESA and its properties such as scale inhibition, corrosion inhibition and dispersion performance.

本工作首次研究了PESA聚合过程中相对分子质量的控制及相对分子质量与PESA的阻垢性能、缓蚀性能、分散性能之间的关系。

Rotary coupon test has been used to study corrosion inhibition of PESA, it has been found that when PESA was used separately, it has some effect of preventing corrosion.

采用动态旋转挂片法研究了PESA的缓蚀性能，发现PESA单独使用时对碳钢即有较好缓蚀作用，其缓蚀作用的本质是在材质表面生成了吸附膜，具有最佳缓蚀效果的分子量范围在750－1000。

The applications of PESA's scale inhibition property in several fields, so we use differert experiment methods to test the scale inhibition of PESA.

鉴于对阻垢剂的需求和阻垢试验方法随应用领域的不同而有很大差别，因而对PESA的阻垢性能的研究采用了不同的研究方法。

In this thesis, PESA was synthesized using two different methods: the conventional one-step method and the two-step method we have developed. The corresponding products obtained by the one-step method and the two-step method are named PESA I and PESA II, respectively.

本文采用传统的一步法和非传统的两步法合成了PESA Ⅰ和PESA Ⅱ两种不同的产物，并通过单因素和正交试验确立了最佳合成路线。

By means of comparing two kinds of PESA which are synthesized by differently graded raw materials with different dosages, different hardness and different alkality, it is found that PESAⅠ has better scale inhibitive capacity than that of PESAⅡ.

通过对两种不同级别原料合成的PESA在不同的加药量、不同硬度和不同碱度等条件下进行阻垢分散性能比较试验发现，PESAⅠ对CaCO3垢的阻垢性能略优于PESAⅡ。

It had been found that when the relative molecular weight changed, the properties changed also. When the relative molecular weight of PESA is in the range 800 to 1000, the scale inhibitions are best. When the relative molecular weight of PESA is lower than 700 or higher than 1000, the scale inhibition becomes worse.

采用鼓泡法研究了PESA的阻垢性能与其相对分子质量的关系，发现当PESA相对分子质量变化时，其性能变化相当大，当相对分子质量在800～1000范围时，钙离子稳定浓度达到120 mgL1以上；当相对分子质量低于700或高于1000时，阻垢性能变差。

Aiming at the quality of copper(HSn-70A),the corrosion inhibition capacity of single PESA is studied. Its composite prescription is developed. The optimum composite scheme is selected as 10 mg/L PESA+ 0.5 mg/L BTA+2 mg/L Zn2++ 10 mg/L sodium gluconate. The corrosion rate of copper is only 0.000 5 mm/a under this condition.

针对凝汽器铜材质(HSn-70A)研究了单一聚环氧琥珀酸的缓蚀性能，开发了与之复配的复合配方，筛选出的最佳复配方案为10 mg/L PESA＋0.5 mg/L BTA＋2 mg/L Zn2+＋10 mg/L葡萄糖酸钠，在此条件下铜的腐蚀率仅为0.000 5 mm/a。

The results indicate that PESA has excellent inhibitive effects to the poor solubility scales such as barium sulfate, calcium sulfate, strontium sulfate and to the calcium carbonate scale is normal.

研究了PESA在油田用水中的阻垢效果，结果表明，PESA对常遇到的硫酸钡、硫酸锶、硫酸钙类难溶垢有着优异的阻垢效果，对碳酸钙也有较好效果。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。