Study of the parameters affecting the emulsion polymerization of vinyl acetate

Badran, A. S.; Yehia, A. A.; Moustafa, A. B.; Shendy, S. M. M.

doi:10.1002/actp.1990.010410312

Cited by 20 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When using TREM LF-40 the particle size decreases with increasing TREM LF-40. Therefore, the rate of polymerization Od"** I 15 22,23 ) as surfactants has confirmed the results previously reported in the literature (Nomura et a1.2') indicating that the rate of polymerization increases with increasing surfactant ' S,: standard deviation; D,: number-average diameter.…”

Section: Particle Size Analysissupporting

confidence: 87%

Emulsion polymerization of vinyl acetate using a polymerizable surfactant. I. Kinetic studies

Urquiola

Dimonie

Sudol

et al. 1992

J. Polym. Sci. A Polym. Chem.

View full text Add to dashboard Cite

A polymerizable surfactant, sodium dodecyl allyl sulfosuccinate (TREM LF‐40; Henkel) and its nonpolymerizable counterpart were used in comparative studies of the emulsion polymerization of vinyl acetate. The conversion‐time behavior differed for the two surfactants; the TREM LF‐40 showed a decrease in the polymerization rate with increasing concentration while its hydrogenated derivative showed the opposite behavior, the rate increasing with increasing surfactant. Particle size analysis revealed a decreasing particle size with increasing surfactant concentration for both series of reactions. An explanation for the seemingly ambiguous results obtained for the polymerizable surfactant was sought by examining the reactivity of its vinyl group in copolymerization with vinyl acetate and its allylic group in a chain transfer reaction. The results suggest that both the copolymerization and chain transfer reactions can lead to the observed reduction in polymerization rate with increasing TREM LF‐40 concentration. © 1992 John Wiley & Sons, Inc.

show abstract

Section: Particle Size Analysissupporting

confidence: 87%

Emulsion polymerization of vinyl acetate using a polymerizable surfactant. I. Kinetic studies

Urquiola

Dimonie

Sudol

et al. 1992

J. Polym. Sci. A Polym. Chem.

View full text Add to dashboard Cite

show abstract

“…− R Cr was also observed to increase with the H + concentration. An increase in μ (0.5–0.8 M ) of the reaction medium at a constant H + concentration (0.5 M ) enhanced R p (obs) in the presence of 0.015 M SDS, and this was in good agreement with the earlier report 21. The increase in μ also increased − R Cr .…”

Section: Resultssupporting

confidence: 91%

Effects of surfactants on acrylonitrile polymerization initiated by a Cr(VI)–cyclohexanone redox system: A kinetic study

Behera

Sinha

2003

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The polymerization of acrylonitrile (AN) was kinetically studied with a Cr(VI)-cyclohexanone (CH) redox system as an initiator from 25 to 45°C in the presence of a surfactant. The rate of polymerization and the percentage of the monomer conversion increased as the concentration of the anionic surfactant [sodium dodecyl sulfate (SDS)] increased above its critical micelle concentration. However, the cationic surfactant (cetyltrimethylammonium bromide) reduced the rate considerably at higher concentrations, whereas the nonionic surfactant (TX-100) had no effect on the rate. The effects of the Cr(VI), CH, AN, and H ϩ concentrations and the ionic strength on the rates were also examined. The presence of 0.015M SDS reduced the overall activation energy of the polymerization by 5.55 kcal/mol with respect to that in the absence of the surfactant. With increasing SDS concentration, the viscosity-average molecular weight also increased. A suitable mechanistic scheme was proposed for the polymerization process.

show abstract

“…The electrolytes NaCl, CaCl 2 , investigators. [1][2][3][4][5][6] We have started to polymerize AlCl 3 , Na 2 SO 4 , and (NH 4 ) 3 PO 4 were obtained vinyl acetate without using any emulsifier 7 to from El-Nile Mining Company. The water used study some parameters and to avoid the problem was purified by distillation.…”

Section: Introductionmentioning

confidence: 99%

Effect of electrolyte on the emulsifier-free emulsion polymerization of vinyl acetate

Moustafa

Abd‐El‐Hakim

Sayyah

et al. 1997

J. Appl. Polym. Sci.

Self Cite

View full text Add to dashboard Cite

ABSTRACT:The emulsifier-free emulsion polymerization of vinyl acetate was carried out in the absence or in the presence of some electrolytes such as sodium chloride, calcium chloride, aluminum chloride, sodium sulphate, and ammonium phosphate at 50ЊC using potassium persulphate-sodium bisulphite as a redox initiation system. The viscosity average molecular weights of the polymers obtained were also determined.

show abstract

Study of the parameters affecting the emulsion polymerization of vinyl acetate

Cited by 20 publications

References 21 publications

Emulsion polymerization of vinyl acetate using a polymerizable surfactant. I. Kinetic studies

Emulsion polymerization of vinyl acetate using a polymerizable surfactant. I. Kinetic studies

Effects of surfactants on acrylonitrile polymerization initiated by a Cr(VI)–cyclohexanone redox system: A kinetic study

Effect of electrolyte on the emulsifier-free emulsion polymerization of vinyl acetate

Contact Info

Product

Resources

About