中文摘要：

以苯乙烯磺酸钠（SSS）、甲基丙烯酰氧乙烯三甲基氯化铵（DMC）和自制聚乙二醇丙烯酸酯大分子单体（PA）为原料，（NH4）2S2O8／Na2SO3氧化还原体系作为引发剂，Na2SO3同时为链转移剂，采用水溶液自由基聚合反应，制得了一种两性聚羧酸系分散荆（PA-SSS-DMC）．通过TGA—DSC，GPC及IR等手段对聚合物的结构、热稳定性以及相对分子质量及其分布进行了表征和分析，并考察了PA—SSS-DMC的合成条件对分散剂性能的影响．用最佳合成工艺制备的分散剂可使神府煤在制浆浓度为63％时黏度为580mPa·s，与山西神华煤、北宿精煤和纯兖州精煤进行匹配性实验，结果表明，分散荆可适用于多种煤制浆，具有可推广性．

英文摘要：

An amphoteric polycarboxylic series dispersant（PA-SSS-DMC） was prepared through radical aqueous solution polymerization using polyethylene glycol-acrylate ester （PA）, styrene sulfonic sodium （SSS） and methacryloxyethyl trimethyl ammonium chloride （DMC） as raw meterial, （NH4）2S2O8/Na2SO3 redox system as initiator, Na2SO3 as chain transfer agent. The copolymer was characterized by TGA-DSC, GPC and IR. The effect of synthetic condition on dispersion efficiency was investigated. When the prepared slurry density is 63%, the min apparent viscosity value of the coal water slurry made from Shenfu coal would be 580 mPa · s. The matc- hing experiment results of the polycarboxylic dispersant synthesized at optimal conditions for coal water slurry made from Shenhua coal, Beisu cleaned coal and Yanzhou cleaned coal showed that the dispersant should be applied to a variety of coals and should be used widely.