聚羧酸盐系水泥助磨剂的合成  

Synthesis of poly-carboxylic cement grinding-aids

作　　者：张昀[1] 徐正华[2] 黄世伟 严生[1,2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京化工大学化工建材设计研究所,江苏南京210009 [3]厦门腾远资源科技有限公司,福建厦门361004

出　　处：《南京工业大学学报（自然科学版）》2009年第6期73-76,共4页Journal of Nanjing Tech University(Natural Science Edition)

摘　　要：通过马来酸酐(MA)和聚乙二醇(PEG)酯化,再与丙烯酸缩聚的技术路线,研究水泥助磨剂的合成工艺及其助磨效果.结果表明:在n(MA)∶n(PEG)=1.4∶1.0、合成反应温度90℃、反应3 h、保温1 h、引发剂的质量为单体质量的2%时,合成的助磨剂助磨效果最佳.在500 mm×500 mm实验磨、助磨剂掺量0.05%、粉磨时间36 min的条件下,水泥的0.08 mm方孔筛筛余降低74%,勃氏比表面积提高19.8%,水泥砂浆3 d抗压强度提高10.5%,28 d抗压强度提高8.3%.In order to synthesize homogeneous and efficient cement grinding aids, the following reaction routes were taken： maleic anhydride （MA） and polyethylene glycol（PEG） esterification; and the synthesis of a new type of cement grinding aids. The synthetic process of cement grinding aids and their grinding effect were discussed. Results showed that the optimun conditions were as follows ： the mole ratio of MA to PEG 1.4： 1.0, reaction temperature 90 ℃, reaction time 3 h, incubation 1 h, and initiator of monomer 2%, the obtained synthetic grinding aids were better. Under the conditions of 6 500 mm × 500 mm grinder, grinding aids ratio 0. 05%, grinding time 36 min, the fineness of cement （0. 08 mm sieve）, Bo＇s specific surface area, 3 d compressive strength of cement mortar, and 28 d compressive strength was increased by 74%, 19. 8%, 10. 5%, and 8. 3%.

关 键 词：聚羧酸 助磨剂 聚乙二醇-马来酸酐 助磨效果 

分 类 号：TQ172.463[化学工程—水泥工业]