超声无皂乳液聚合制备AMPS/MMA二元共聚微球

Preparation of AMPS/MMA Copolymer Microspheres via Ultrasonic Emulsifier-free Emulsion Polymerization

在不加任何引发剂和乳化剂的条件下,用超声辐射无皂乳液聚合合成了AMPS/MMA二元共聚微球,用FTIR、TGA-DSC、TEM和粒度分析仪等测试技术对产物结构和热性能分别进行了表征和测试,并初步探讨了聚合反应机理。结果表明,超声波功率为200W,在45℃反应75min后转化率达83%,合成得到的高分子微球分散均匀,粒径在0.77μm左右,Tg为120℃。

AMPS （2-acrylamido-2-methylpropanesulfonicacid）/MMA （ methyl methaerylate） copolymer micro- spheres were prepared without initiator or emulsifier by ultrasonic irradiation emulsifier-free emulsion polymerization. The samples were characterized and tested by FTIR, TGA-DSC, TEM and Zeta-sizer, and the reaction mechanism of the copolymerization was studied as well. The results show that the monomer conversion was 83% in 75 minutes at a power output of 200 W and 45 ℃. The microspheres possess a good dispersity, a uniform size with a diameter of O. 77 μm and a Tg of 120 ℃.