用加晶种于过饱和溶液中的方法测定了硫酸钙晶体结晶生长的动力学过程，研究了9种不同阻垢剂及实验条件变化对CaSO4.2H2O结晶生长诱导期的影响.研究表明，聚丙烯酸、马丙共聚物对硫酸钙晶体生长有良好的阻滞作用，这种阻滞作用随着溶液pH上升而增强，随温度升高而减弱，分子量较低的聚丙烯酸和马丙共聚物有更好的阻垢效果.研究发现，阻垢的机理主要是阻垢剂对CaSO4.2H2O晶种表面具有吸附作用，从而抑制了CaSO4.2H2O的结晶生长，实验还证实了这种吸附作用符合Langmuir等温吸附特征.
The dynamic growth process of CaSO4.2H2O crystal was studied byseeded crystallization of the supersaturated solution. The induction periods of CaSO4.2H2O crystal under the condition of adding nine different scale inhibitors have been determined. It was found that PAA and PMAAA had a better inhibiting action to the scale formation of calcium sulfate. The higher solution pH and the lower solution temperature, the higher their inhibition ability. The PAA or PMAAA of lower molecular weight showed much higher inhibiting ability. It has been demonstrated that the possible mechanism of scale inhibition is the adsorption of inhibitors on the active sites of the surfaces of crystal CaSO4.2H2O. The adsorption of PAA and PMAAA on the crystal surfaces accorded with the characters of Langmuir model.
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