紫外光引发模板聚合阳离子聚丙烯酰胺及其表征  

UV-initiated template polymerization and characterization of cationic polyacrylamide

作　　者：郑怀礼[1,2] 郑晓楷[2] 冯力[1,2] 朱传俊[3] 寿倩影 关庆庆[2] 孙永军[2] 廖勇[2] 

机构地区：[1]重庆市水处理混凝剂工程研究中心,重庆400045 [2]重庆大学城市建设与环境工程学院,重庆400045 [3]中海油天津化工研究设计院,天津300131

出　　处：《环境工程学报》2016年第3期1184-1190,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21477010)

摘　　要：采用紫外光引发,以聚丙烯酸钠（PAAS）为模板,丙烯酰胺（AM）和丙烯酰氧乙基三甲基氯化铵（DAC）为单体,制备得到阳离子聚丙烯酰胺P（AM-DAC）。通过红外光谱、^1H-NMR光谱、电镜扫描、差热-热重分析对P（AM-DAC）的结构和热性能进行表征。为提高P（AM-DAC）的相对分子质量,通过单因素实验对制备条件进行了优化,结果表明：当DAC质量分数25%、引发剂浓度0.065%、反应体系pH值4.5、紫外光灯管功率500 W以及紫外光照射时间60 min时,P（AMDAC）相对分子质量可达到533万。研究证明,P（AM-DAC）是AM与DAC的共聚物,其分子链上含有微嵌段结构,其表面分布有大量不均匀的凹凸结构,且在30-200℃温度范围内有良好稳定性。In this study,cationic polyacrylamide P（ AM-DAC） initiated by UV was synthesized using PAAS as a template and acrylamide（ AM） and acryloyloxyethyl trimethyl ammonium chloride（ DAC） as monomers. FTIR,^1H-NMR,SEM,and DSC-TGA were employed to study the chemical structure and thermal stability of P（ AM-DAC）. In order to increase the relative molecular weight of P（ AM-DAC）,the synthetic conditions were studied and optimized by a single-factor experiment. The results showed that a relative molecular weight for P（ AM-DAC） of up to 5. 33 million was attained under the following conditions： DAC concentration,25%; initiator A concentration,0. 065%; pH,4. 5; UV lamp power,500 W; and UV irradiation time,60 min. It was demonstrated that the P（ AM-DAC） prepared in this study was a copolymer of AM and DAC with a micro-block structure found at the molecular chain,and with plenty of nonuniform concave-convex structures on the surface.Overall,it presented good thermal stability between 30 and 200 ℃.

关 键 词：阳离子聚丙烯酰胺 紫外光引发 模板聚合 单因素实验 相对分子质量 表征 

分 类 号：X703[环境科学与工程—环境工程]