缓释型聚羧酸减水剂的合成及性能研究

Synthesis and Properties of Sustained Release Polycarboxylate Superplasticizer

文章以甲基烯丙基聚氧乙烯醚(TPEG)、丙烯酸(AA)、甲基丙烯磺酸钠(MAS)为主要原材料,过硫酸铵(APS)作为引发剂,通过正交原理方法合成聚羧酸减水剂。以水泥净浆流动度表征,得出最佳合成工艺:n(TPEG)∶n(AA)∶n(MAS)∶n(APS)=1∶2.0∶0.06∶0.20,反应温度为60℃,滴加反应时间为4 h。然后选做混凝土性能测试、红外光谱分析。研究表明,此工艺合成的聚羧酸减水剂具有良好的缓释效果。

The paper reviews the polycarboxylate superplasticizer is synthesized by using TPEG, AA, MAS, APS as chain transfer agent, in orthogonal test. Compare by the fluidity of cement initial, the optimal working parameters of process can be obtained, It is n（TPEG） ： n（AA） ： n（MAS） ： n（APS）=1 ： 2.0 ： 0.06 ： 0.20, the reaction temperature is at 60 ℃, the reaction time is 4 h. The detection of performance concrete and IR analysis are selected to do. The study shows that the polycarboxylate superplasticizer has good sustained release performance.