【作者】 游纪萍；

【导师】 陈少平；

【作者基本信息】 福建师范大学 ， 高分子化学与物理， 2006， 硕士

【摘要】 本文首先采用紫外分光光度法、胶体滴定法研究了聚二甲基二烯丙基氯化铵(DADMAC)—丙烯酰胺(AM)的自由基共聚反应中单体的转化率，提供了一种检测DADMAC—AM共聚反应中残留AM的方便、快捷的分析方法；探讨了控制共聚物组成的方法。首次采用多角度激光散射技术研究了阳离子度为10％的DADMAC—AM共聚物在不同溶剂中的分子量、均方旋转半径、第二维利系数等基本参数，为深化絮凝剂的性能研究提供了理论依据；通过多角度激光散射一凝胶色谱联用技术的分析结果指出DADMAC—AM共聚物在0.1mol／L NaCl水溶液中的分子链较舒展，为柔顺性无规线团构象；并且建立了阳离子度为10％的DADMAC—AM共聚物在0.1mol／L NaCl水溶液中的Mark-Houwink方程，从而可在参数适用范围内通过比较简单的粘度法得到DADMAC—AM共聚物的重均分子质量，具有很大的实用价值。更多还原

【Abstract】 In this thesis, the UV spectrophotometry and colloid titration were used to determine the monomer conversion rate in diallyldimethylammonium chloride (DADMAC) and acrylamide (AM) radical copolymerization, providing a simple and convenient method to measure the content of AM in copolymerization reaction. The methods to control constitution of the copolymers were investigated. The weight average molecular weight, rms radius, second virial coefficient of DADMAC—AM copolymer in different solvent were studied by multiple angle laser light scattering for the first time. The studies offered theoretical foundation for improvement in performance of flocculating agents. The technology of the high performance gel permeation chromatograph-multiple angle laser light scattering was also used to study the DADMAC—AM copolymer. The results showed that DADMAC—AM copolymer in NaCl aqueous solution exhibited more extended conformation. They are flexible random coil. The equation of Mark-Houwink for the copolymers is determined. It provides a convenient method to determine the weight average molecular weight of DADMAC — AM copolymer in a measured applicable range. The studies have large practical values.更多还原