细乳液聚合法制备含氟丙烯酸酯共聚物乳液的研究

通过细乳液聚合法制备含氟丙烯酸酯共聚物（FPA）乳液，采用红外光谱（ FT-IR）、透射电镜（TEM）、原子力显微镜（AFM）、热重分析仪（ TG）、扫描电镜和表面能谱（ SEM-EDS）等对聚合物进行表征，并考察了乳化剂与助乳化剂的物质的量比，氟单体用量和超声时间对乳液粒径的影响。结果表明，甲基丙烯酸六氟丁酯（ 6FA）、丙烯酸丁酯（ BA）、苯乙烯（ St）3种单体成功聚合，乳化剂与助乳化剂的物质的量比为 1.5∶1，超声时间为 60 min，氟单体用量为 10%时，乳液粒径最小且分布较窄，表面张力从 45.028 mN/m降至 33.399 mN/m，且乳胶膜粗糙度增加，热稳定性提高。

Study on Preparation of Fluorinated Acrylate Copolymer Latice through Mini-Emulsion Polymerization

A series of latice based on fluorinated acrylate（FA）copolymers were prepared through mini-emulsion polymerization and were characterized by FT-IR，PSA，TEM，AFM，TG，and SEM-EDS. The influences of molar ratio of emulsifier（SDS）and co-emulsifier（HD），the FA amount and the ultrasonic time on the particle size of above lattice were investigated in detail. The results showed that three kinds of monomers（6FA，BA and St）were successfully copolymerized. When the molar ratio of SDS/HD was 1. 5∶1，the ultrasonic time was 6 min and the FA amount was 10%，the resulted latice showed the smallest particle size and the narrower distribution. Furthermore，the surface tension of latex decreased from 45. 028 mN / m to 33. 399 mN / m. At the same time，the roughness of the latex films was increased and the thermal stability was enhanced.