摘要
本文研究了pH=4.5时柠檬酸对氧化铝浆料固化的影响。用流变仪测试过硫酸铵(APS)和四甲基乙二胺(TEMED)氧化还原体系作为引发体系引发丙烯酰胺(AM)自由基聚合过程,交联剂为N,N'-亚甲基双丙烯酰胺(MBAM)。通过体系聚合过程的复数模量G*和温度的变化曲线,讨论了柠檬酸对丙烯酰胺自由基聚合的阻聚作用,并用乙酸加以验证,说明有机酸使氧化铝浆料不能固化的原因。
The inhibition action of citric acid was found on the gelation of 32voi% alumina slurry as pH value was 4.5. The influence of citric acid on the polymerization of acrylamide cross-linked by N,N＇-menthylene-bis-acrylamide initiated by APS and TEMED was investigated by a stress control rheometer equipped with a four-blade vane. The modular G^＋ and temperature development in polymerization process were used to elucidate the polymerization process. The effect of citric acid and acetic acid on the polymerization reaction was discussed as pH value was 4.5 and 10.5 and concluded that inhibition action of citric acid were due to the carboxy group in the citric acid molecular in lower pR value solutions.
出处
《佛山陶瓷》
2006年第4期2-5,共4页
Foshan Ceramics
