为提高聚天冬氨酸(PASP)抑制碳酸钙结垢的性能,改性合成了新型产品天冬氨酸-衣康酸共聚物(PAI).采用静态阻垢法,考察不同水质条件对 PAI 阻垢性能的影响,并与改性产品天冬氨酸-赖氨酸共聚物(PAL)和市售PASP进行了对比；初步从动力学角度,考察了 PAI、有机膦系阻垢剂 PBTCA 和 PASP 在特定条件下阻垢效果的差异.结果表明,相同实验条件下,PAI 的阻垢率最高可达90．12％,略优于 PAL,明显高于PASP；碳酸钙结晶生长速率常数分别为k(PBTCA)＝30．39＜k(PAI)＝34．806＜k(PASP)＝40．557.表明PAI是阻垢性能优异的新型改性产物,适用于水质条件不稳定和水力停留时间较长的用水系统.
In order to enhance the inhibition performance on CaCO3 ,polyaspartic acid (PASP)has been modi-fied into a new product poly(aspartic acid-itaconic acid)(PAI).Static scale method was employed to study the effect of different water quality conditions on PAI scale-inhibiting performance,which was compared with an-other modified product aspartic acid - lysine copolymer (PAL)and commercial PASP.From the perspective of the crystallization kinetics,the difference on inhibition performance of PAI,organic phosphine inhibitor PBTCA and PASP was investigated difference under a certain condition.The results show that ,under the same experi-mental condition,the inhibition rate of PAI can reach up to the peak of 90.12%,which is slightly better than PAL while significantly higher than the PASP.Crystal growth rate constants of calcium carbonate are k(PBT-CA)=30.39
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