Synthesis of soap-free emulsion with high solid content by differential dripping RAFT polymerization-induced self-assembly
Juanjuan Wu a , Chun Tian a, Lifen Zhang*a（张丽芬）, Zhenping Cheng*a（程振平）and Xiulin Zhu*a（朱秀林）
a Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
RSC Adv., 2017,7, 6559-6564
Polymerization induced self-assembly (PISA) has been a facile and effective approach to prepare highly concentrated block copolymer nano-objects in situ. In this work, a soap-free emulsion with high solid content (60%) was successfully prepared in a semi-batch monomer addition manner. High monomer conversion can also be obtained by adjusting the dripping time. At first, a hydrophilic polymer, poly(poly(ethylene glycol)monomethyl ether methacrylate) (PPEGMA) was synthesized at almost complete monomer conversion in order to be used as a macroRAFT agent without any purification in the following step. Then PPEGMA was chain extended by the second monomer, methyl methacrylate (MMA), added at a very slow rate to form diblock copolymers and further self-assembled into nanoparticles in situ. The resulting latexes were very stable and the particle sizes remained at the nanoscale.
链接：http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C6RA27290H?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2Fra+%28RSC+-+RSC+Adv.+latest+articles%29&utm_content=Yahoo+Search+Results#!divAbstract