title: High purity nanolatex prepared by ultrasonically irradiated emulsion polymerization.
abstract: Ultrasonically initiated emulsion copolymerization of styrene and a cationic polymerizable surfactant (methacryloxyethyl dodecydimethyl ammonium bromide, C(12)N(+)) was successfully employed to prepare high purity copolymer nanolatex. C(12)N(+) can play the roles of an emulsifier, an initiator, and a comonomer at the same time. It has an excellent initiation efficiency and reactivity. The rate of copolymerization was high and styrene conversion achieved 95% in an hour. Nanoscale latex particles with average diameter 40 nm were obtained easily under ultrasonic irradiation. Results of FTIR, (1)H NMR and surface tension tests proved almost all surfmers had copolymerized with styrene when the C(12)N(+) concentration was more than 0.030 g/mL, indicating high purity nanolatex without residual emulsifiers was obtained.
authors.affiliation: State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China. Electronic address: caoya44@hotmail.com.
authors.forename: Ya
authors.initials: Y
authors.lastname: Cao
authors.affiliation: State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
authors.forename: Guangqin
authors.initials: G
authors.lastname: Pan
mesh_terms: D004655:Emulsions; D007840:Latex / Q000737:chemistry* / Q000528:radiation effects*; D009682:Magnetic Resonance Spectroscopy; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects*; D010316:Particle Size; D011108:Polymers / Q000138:chemical synthesis; D017550:Spectroscopy, Fourier Transform Infrared; D013500:Surface Tension; D014465:Ultrasonics
chemical_list: D004655:Emulsions; D007840:Latex; D011108:Polymers