丙烯酸共聚物的合成及在陶土中的应用—II. 丙烯酸-衣康酸共聚物

Synthesis of AA in Aqueous Solution and its Application in Ceramic Slurry – II. Acrylic acid - Allyl sulfonate copolymer

摘要:

在水溶液中以过硫酸铵为引发剂，次亚磷酸钠为链转移剂合成了丙烯酸-衣康酸的共聚物,用于陶瓷料浆分散剂。探讨了不同反应条件对陶土料浆黏度的影响。通过研究发现丙烯酸-衣康酸共聚物的最佳合成条件为：反应温度80℃，过硫酸铵的添加量为单体总质量的0.8%，次亚磷酸钠的添加量为单体总质量的9%，引发剂质量与单体的总质量的比例为0.9:100。通过FTIR对共聚物的结构进行了表征，并对料浆的黏度，坯体样条的弯曲强度以及断裂面的微观结构进行了研究。结果表明，当共聚物的添加量为陶土质量的0.25%时，陶土料浆的黏度到从1998mPa•s降低到685mPa•s；陶土坯体的弯曲强度从1.96MPa增加到2.88MPa。

Abstract:

Acrylic acid-itaconic acid copolymers were synthesized in water. Ammonium persulfate was used as initiator and sodium hypophosphite as chain transfer agent. The influence of different reaction conditions on the clay slurry viscosity was investigated. The optimal conditions were shown as follow: the temperature was 80℃, 0.8% ammonium persulfate by the mass of monomer, 9% sodium hypophosphite, and 0.9% initiator. The structure of copolymer was characterized by FTIR. The viscosity and bending strength of the slurry and the microstructure of the fracture surface were also studied. The results showed when adding 0.25% copolymer, the viscosity of the clay slurry was reduced from 1998mPa•s to 690mPa•s and the body strength was increased from 1.96MPa to 2.88MPa.