【摘要】 将乙烯装置副产物C9芳烃馏分、丙烯酸及聚乙二醇与过量马来酐部分酯化物通过自由基溶液共聚,制得了一种新型C9水溶性石油树脂减水剂,并对该减水剂进行了表面性能和分散性能的测试,研究了高效减水剂的作用机理。结果表明,该减水剂可降低水表面张力约22．3％;当掺量达到1．O％时,减水剂在水泥颗粒表面吸附量达到饱和;添加减水剂的水泥净浆pH值的变化表明减水剂延缓了水泥的早期水化,提高了体系的分散性和分散稳定性。水泥净浆流动度试验表明,所制备的减水剂对水泥粒子有较好的分散作用。更多还原

【Abstract】 C9 water-soluble petroleum resin as water-reducer was prepared by free radical polymerization. The monomers were consisted of C9 fraction which was a by-product from the production of ethylene, acrylic acid and a mixture of the polyethylene glycol which was partially esterized with excessive maleic anhydride. The results showed that the surface tension of water decreased from 72. 5 to 56. 4 mN/m; adsorption on the surface of cement was fully saturated by adding 1. 0% terpolymer; pH variation with the addition of the polymer indicated the retarding effect of water-reducer on cement hydration. The fluidity showed that this water-reducer had good dispersion characteristics.更多还原