CAJ | 학술논문

选用聚醚和羟基酯通过自由基聚合成了缓释型聚羧酸分散剂，通过核磁共振氢谱对结构进行了表征，并运用zeta电位和吸附动力学对其作用机理进行了探索，研究表明，羟基酯在水泥的碱性环境下能够释放出吸附基团，进而补充被水化产物覆盖的分散剂发挥分散作用，且随着时间的延长，可吸附的分散剂持续增加，使其对水泥颗粒的分散性在一定时间范围内逐渐增强。另外，随着羟基酯比例的增加，释放的吸附基团增加，分散作用增加。
선용취미화간기지통과자유기취합성료완석형취최산분산제，통과핵자공진경보대결구진행료표정，병운용zeta전위화흡부동역학대기작용궤리진행료탐색，연구표명，간기지재수니적감성배경하능구석방출흡부기단，진이보충피수화산물복개적분산제발휘분산작용，차수착시간적연장，가흡부적분산제지속증가，사기대수니과립적분산성재일정시간범위내축점증강。령외，수착간기지비례적증가，석방적흡부기단증가，분산작용증가。
Slow-released polycarboxylate dispersants were synthesized with polyether and hydroxy esters by free radical polymerization.The structure of products were identified by 1 H NMR spectra,and the mechanism of dispersion was explored by zeta potential and adsorption kinetics.The results showed that hydroxyl esters could release adsorptive group in alkaline environment of cement,to play a role of dispersion as supplementary disper-sant covered by hydration products.The adsorption of dispersants continued to increase with the time,the dis-persion of cement particles in a certain time gradually enhanced.In addition,with the increase of hydroxy esters ratio,the release of adsorptive groups increased,the dispersion effect increased.