摘要
采用可聚合单体直接共聚法,以过硫酸铵(APS)为引发剂,选用丙烯酸(AA)、甲基丙烯磺酸钠(SMAS)、烯丙基聚氧乙烯醚(JFB-23)为单体合成了聚羧酸系减水剂,考察了SMAS、AA、JFB-23物质的量之比、引发剂用量、聚合温度、滴加时间和保温时间对合成的聚羧酸减水剂性能的影响。减水剂的结构和分子质量分别用FTIR和GPC进行表征。结果表明最佳实验条件为SMAS、AA、JFB-23的物质的量之比为0.8∶3∶1,引发剂用量为单体总质量的4%,聚合温度为85℃,滴加时间为2 h,保温时间2.5 h。
The polycarboxylate based superplasticizer was synthesized by water solution copolymerization of acrylic acid（AA）,sodium methyl acryl sulfonate（SMAS） and allyl polyethylene glycol（JFB-23）.Ammonium persulfate（APS） was used as the initiator.The mole ratio of monomers,the dosage of initiator,the polymerization temperature and the reaction time on the performance of polycarboxylate based superplasticizer were investigated.The structure and molecular mass of superplasticizer were characterized by FTIR and GPC.The results indicated that the polycarboxylate based superplasticizer with better performance could be obtained when n（AA）∶ n（SMAS）∶ n（JFB-23）=0.8∶ 3∶ 1,the dosage of initiator was 4 % of the monomer weight,the polymerization temperature was 85 ℃,the adding time was 2 h and the soaking time was 2.5 h.
出处
《山东大学学报（理学版）》
CAS
CSCD
北大核心
2013年第5期29-33,共5页
Journal of Shandong University(Natural Science)
