超高分子量聚丙烯酰胺的辐射合成技术研究  

Study on radiation synthesis of ultra-high molecular weight polyacrylamide

作　　者：邵赛[1,2,3] 赵彩凤 张乐平[1,2,3] 邵颖 李先[1] SHAO Sai;ZHAO Cai-feng;ZHANG Le-ping;SHAO Ying;LI Xian(Institute of Nuclear Agricultural Science and Space Mutation Breeding,Hunan Academy of Agriculture Sciences,Changsha 410125,China;Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation,Changsha 410125,China;Hunan Province Biological Irradiation Techonology Engineering Research Center,Changsha 410125,China)

机构地区：[1]湖南省农业科学院核农学与航天育种研究所,湖南长沙410125 [2]湖南省农业生物辐照工程技术研究中心,湖南长沙410125 [3]生物辐照技术湖南省工程研究中心,湖南长沙410125

出　　处：《应用化工》2018年第3期490-493,共4页Applied Chemical Industry

基　　金：湖南省农业生物辐照工程技术研究中心科学基金开放项目(2016KF002);湖南省农业科学院科技创新项目(2016QN09);湖南省环境保护厅科研课题湘财建指[2016]59号

摘　　要：采用丙烯酰胺(AM)和丙烯酸(AA)为主体单体,次磷酸钠为链转移剂,通过^(60)Co-γ射线辐射引发,制备阴离子聚丙烯酰胺(APAM),研究了链转移剂含量、吸收剂量、剂量率对APAM分子量的影响。结果表明,APAM的分子量与吸收剂量呈正相关,而与链转移剂含量呈负相关。在丙烯酰胺∶丙烯酸=180∶60,单体浓度为30%,次磷酸钠为0.15‰,吸收剂量为300 Gy,剂量率为25 Gy/h的条件下,得到的APAM黏均分子量为2.93×10~7。在气动旋转反应釜中,剂量率为25~40 Gy/h,吸收剂量为125~200 Gy,合成的APAM分子量基本相同,最高可达2.88×10~7,且残留单体含量(干基)为0.01%。Acrylamide(AM)and acrylic acid(AA)are used as main monomers,sodium hypophosphite as chain transfer agent,via 60 Co-γray radiation polymerization anionic polyacrylamide(APAM).The effects of chain transfer agent content,radiation dose,radiation dose rate were studied.The results indicate that the molecular weight of APAM is positively correlated with the radiation dose,but negatively correlated with the chain transfer agent content.Under the optimized polymerization condition(AM∶AA=180∶60,monomers concentration 30%,NaH 2PO 2·H 2O 0.15‰,dose 300 Gy,dose rate 25 Gy/h),the molecular weight can be reached 2.93×10 7.The radiation dose was 125~200 Gy,and the dose rate was 25~40 Gy/h in the pneumatic rotary reactor,after polymerization the molecular weight of APAM was basically the same,the highest was 2.88×10 7,and the residual monomer content(dry basis)was 0.01%.

关 键 词：聚丙烯酰胺 辐射 超高分子量 气动旋转反应釜 

分 类 号：TQ317[化学工程—高聚物工业] TQ03