SEMI-CONTINUOUS EMULSION COPOLYMERIZATION OF VINYL ACETATE AND BUTYL ACRYLATE IN PRESENCE OF AMPS
作者： Yuhong Zhang , Shanshan Pan , Shulun Ai , Hang Liu , Haiping Wang
DOI: 10.1007/S13726-013-0205-8
关键词: Copolymer 、 Emulsion polymerization 、 Chemical engineering 、 Polymerization 、 Vinyl acetate 、 Particle size 、 Butyl acrylate 、 Polymer chemistry 、 Polymer 、 Materials science 、 Dispersity
摘要: The emulsifier-free emulsion polymerization of vinyl acetate (VAc) and butyl acrylate (BA) in the presence 2-acrylamido-2-methylpropane sulfonic acid (AMPS) was carried out by a semi-continuous process. AMPS reactive surfactant aqueous emulsion, due to its amphiphilic structure unsaturated double bonds. Potassium persulfate (KPS) used as initiator. following factors were mainly examined: quantity AMPS, BA KPS concentrations, which could significantly affect particle size distribution, conversion, gel content, minimum film-forming temperature, etc. distribution characterized dynamic laser analyzer, morphology latex particles transmission electron microscopy (TEM). Fourier transform infrared spectroscopy characterize chemical copolymers. results indicated that successfully reacted onto resulted copolymer acrylate. A hydrophilic group molecular tended be distributed surface after polymerization. As result, an electrostatic repulsion between produced order maintain stability system. Thermogravimetric analysis curves suggested content increased, thermal polymer increased accordingly. conversion-time plots with varying initiator contents obtained, illustrated concentration greatly influence rate final conversion. TEM micrographs for P(VAc/BA/AMPS) system revealed small monodisperse latex. measured about 150 nm.
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