ATRP法合成聚羧酸类高效减水剂  

Synthesis of Polycarboxylic Acid-Based Superplasticizer via ATRP

作　　者：王文平[1] 朱国军[1] 成立强[1] 费明[1] 曹恒明[1] 王鹏[1] 

机构地区：[1]合肥工业大学化学工程学院,安徽合肥230009

出　　处：《高分子材料科学与工程》2011年第3期16-18,共3页Polymer Materials Science & Engineering

摘　　要：以对苯乙烯基磺酸钠和丙烯酸钠嵌段共聚物(PSStNa-b-PAANa)为大分子引发剂,甲基丙烯酸甲酯为单体,采用原子转移自由基聚合(ATRP)方法,制备对苯乙烯基磺酸钠、丙烯酸钠和甲基丙烯酸甲酯三嵌段共聚物(PSStNa-b-PAANa-b-PMMA),并通过酯交换方法在聚合物分子上接枝聚乙二醇单甲醚(MPEG)以得到聚羧酸类减水剂。利用红外光谱(FT-IR)、核磁共振(1H-NMR)测试手段对聚合物的结构进行表征,通过测试其净浆流动度研究了聚合时间和产物性能之间的关系。结果表明,实验成功地合成出三嵌段结构的聚羧酸类高效减水剂,当聚合时间为26 h时,产物的净浆流动度为149 mm。A new polycarboxylic acid-based superplasticizer（PSStNa-b-PAANa-b-PMPEG）was synthesized via the combination of atom transfer radical polymerization（ATRP） and resin exchanged technology.PSStNa-b-PAANa-b-PMMA was prepared using PSStNa-b-PAANa as macromolecule initiator by atom transfer radical polymerization（ATRP） of methyl methacrylate,and then reacted with methoxypoly（ethylene glycol）（MPEG） to synthesize triblock copolymer.The molecule structure of polycarboxylic acid-based superplasticizer was studied by FT-IR and 1H-NMR.And then the influence of reaction time on the fluidity of cement paste was investigated.The result shows that our design is successful and the product reaction time with 26 h has the best performance in this way.

关 键 词：原子转移自由基聚合 聚羧酸 减水剂 净浆流动度 

分 类 号：TQ316.322[化学工程—高聚物工业]