摘要
在甲醇存在下 ,以苯乙烯 (St)和丙烯酸丁酯 (BA)为主单体、丙烯酸 -2 -羟乙酯(HEA)为功能单体 ,采用无皂乳液聚合技术 ,合成了聚合物微球。考察了助溶剂甲醇的用量、引发剂用量 ,以及丙烯酸 -2 -羟乙酯的用量对聚合反应速率、乳胶粒的粒径及单分散性的影响。试验结果表明 ,加入适量的甲醇可以加快聚合反应速率 ,增大乳胶粒的粒径 ,提高单分散性。另外 ,在一定量的甲醇存在下 ,增加引发剂以及丙烯酸-2 -羟乙酯的用量加快了反应速率 ,同时也使乳胶粒的粒径增大。
By means of soap free emulsion the polymer microspheres have been synthesized with styrene (St)、butyl acrylate(BA) and hydrophilic monomer(HEA) in the presence of methanol. The effects of the cosolvent methanol dosage, the initiator dosage and hydrophilic monomer dosage on the polymerization rate and the final latex particle diameter were studied. The results show that the polymerization rate speeds up, the final latex particle diameter and its monodispersity increase as long as the proper amount of methanol is added. The polymerization rate and the final latex particle diameter rise with increasing the initiator dosage and hydrophilic monomer dosage in the presence of methanol.
出处
《化学工业与工程》
CAS
2001年第5期249-254,265,共7页
Chemical Industry and Engineering
