摘要
用磷酸钠取代常见链转移剂异丙醇,在引发剂w(过硫酸钠)=5.0%,链转移剂w(磷酸钠)=33%,单体φ(丙烯酸)=50%,和反应温度55℃的条件下,合成了相对分子质量1 500的聚丙烯酸钠。产物的红外光谱说明,丙烯酸单体已完全聚合,产物中有磷酸根与亚甲基的键合作用。相对分子质量为1 500的聚丙烯酸钠是一种高效的陶瓷助磨减水剂和增强剂,能使泥浆的黏度降低到180 MPa.s,使泥浆的200目筛余物质量分数降低到0.4%,使坯体干燥强度增强率提高到280%。
Instead of conventional isopropyl alcohol, sodium phosphate is applied to the production of sodium polyacrylates of relative molecular mass 1 500 with initiator w （sodium persulfate） = 5.0%, chain transfer agent w （sodium phosphate） = 33% and monomer φ （acrylic acid） = 50% at 55 ℃. Infrared spectrum of the product shows that acrylic acid is completely polymerized and the product contains the bond formation between methylene and phosphate radicals. Sodium polyacrylate of molecular weight 1 500 is an effective ceramic grind additive, deflocculant and reinforcing agent. It reduces the slurry viscosity to 180 MPa.s and the slurry tailover through 200-screen mesh to 0.4 wt% , and increases the folding strength of the ceramic dry body by 280%.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2006年第3期294-297,共4页
Fine Chemicals
基金
佛山市科技攻关项目~~
关键词
陶瓷
聚丙烯酸钠
减水剂
助磨剂
增强剂
ceramic
sodium polyacrylate
deflocculant
grind additive
reinforcing agent
