Semicontinuous Emulsion Polymerization of Vinyl Acetate. Part II. Copolymerization with Dibutyl Maleate
1985; Marcel Dekker; Volume: 22; Issue: 5-7 Linguagem: Inglês
10.1080/00222338508056646
ISSN2332-4082
AutoresD. Donescu, Kristiana Goşa, J. Languri, A. Ciupiţoiu,
Tópico(s)Polymer Science and PVC
ResumoAbstract The semicontinuous emulsion copolymerization of vinyl acetate: dibutyl maleate (60:40, vol/vol) was carried out at different co-emulsifier distributions between initial reactor charge and continuously introduced monomer. The overall conversion, the co-polymer particle size, and the properties of films obtained from emulsions were determined experimentally. Polyvinyl alcohol and cetyl alcohol ethoxylated with ethylene oxide (20 moll were used as protective colloid and coemulsifier, respectively. Experimental investigations have shown that the unreacted monomer concentration and the copolymer particle size oscillate with time. These oscillations are related to a tendency for limited particle flocculation.
Referência(s)