Synthesis of porous poly(styrene-co-acrylic acid) microspheres through one-step soap-free emulsion polymerization: Whys and wherefores
作者：Yan, Rui; Zhang, Yaoyao; Wang, Xiaohui; 等
關(guān)鍵字：emulsion polymerization
論文來(lái)源：期刊
具體來(lái)源：JOURNAL OF COLLOID AND INTERFACE SCIENCE
發(fā)表時(shí)間：2012年
www.sciencedirect.com/science/article/pii/S0021979711013920
Synthesis of porous poly(styrene-co-acrylic acid) (PS-co-PAA) microspheres through one-step soap-free emulsion polymerization is reported. Various porous PS-co-PAA microspheres with the particle size ranging from 150 to 240 nm and with the pore size ranging from 4 to 25 nm are fabricated. The porous structure of the microspheres is confirmed by the transmission electron microscopy measurement and Brunauer-Emmett-Teller (BET) analysis. The reason for synthesis of the porous PS-co-PAA microspheres is discussed, and the phase separation between the encapsulated hydrophilic poly(acrylic acid) segment and the hydrophobic polystyrene domain within the PS-co-PAA microspheres is ascribed to the pore formation. The present synthesis of the porous PS-co-PAA microspheres is anticipated to be a new and convenient way to fabricate porous polymeric particles. (C) 2011 Elsevier Inc. All rights reserved.