Process Parameters and Their Effect on Grafting Efficiency and Degree of Grafting in Styrene-Acrylonitrile-graft Polybutadiene (g-ABS) Using Seeded Emulsion Polymerization

Document Type : Research Paper

Abstract

Graft copolymers of acrylonitrile (AN) styrene (SM) onto polybutadiene (PB) were prepared via seeded  emulsion polymerization method using a redox initiator system, cumene hydroperoxide-tetrasodium pyrophosphate-ferrous sulfate-dextrose. The effects of initiator, chain transfer agent, reaction temperature, monomer dropping frequency, polymer to grafting monomer ratio on the grafting efficiency and degree of grafting were investigated. It was found that grafting efficiency and degree of grafting depended upon the concentration and initiator dropping frequency; it increased as the concentration and dropping time were increased. The grafting efficiency and degree of grafting increased by increasing monomer dropping frequency. The amount of free SAN was found to decrease concurrently by increasing monomer dropping time. The optimum temperature and monomer addition time for grafting reaction were 70°C and 120 minutes respectively.
 

Keywords

References

[1] Lovell P. A. & El-Aasser M.S., Emulsion Polymerization and Emulsion Polymers, John Wiley & Sons, 1997.
[2] Brydon A., Burnett G.M. & Cameron G.G., “Free-radical grafting of monomers to polydienes. I. effect of reaction conditions on grafting of styrene to polybutadiene”, Journal of polymer science: Polymer Chemistry Edition, Vol. 11, No. 12, pp. 3255-3269, 1973.
[3] Huang N.J. & Sundberg D.C., “Fundamental studies of grafting reactions in free radical copolymerization. 1. A detailed kinetic model for solution polymerization”, Journal of polymer science: Part A: Polymer Chemistry, Vol. 33, No. 15, pp. 2533-2549, 1995.
[4] Huang N.J. & Sundberg D.C., “Fundamental studies of grafting reactions in free radical copolymerization. II. grafting of styrene, acrylate, and methacrylate monomers onto cis-polybutadiene using AIBN initiator in solution polymerization”, Journal of polymer science: Part A: Polymer Chemistry, Vol. 33, No.15, pp. 2551-2570, 1995.
[5] Daniels E.S., Dimonie V.L., El-Aasser M.S. & Vanderhoff J.W., “Preparation of ABS (acrylonitrile/butadiene/styrene) latexes using hydroperoxide redox initiators”, Journal of Applied Polymer Science, Vol. 41, No. 9, pp. 2463-2477, 1990.
[6] Merkel V.L., El-Aasser M.S. & Vanderhoff J.W., “Process parameters and their effect on grafting reaction in core/shell latexes”, Journal of polymer science: Part A: Polymer Chemistry, Vol. 25, No. 7, pp. 1755-1767, 1990.
[7] Vilasagar S., Enhanced polymerization process, U.S. Patent 6784253, 2004.
[8] Okaniwa M., “Synthesis of poly (dimethylsiloxane) and poly (butadiene) composite particles and properties of their grafted polymer particles”, Polymer, Vol. 41, No. 2, pp. 453-560, 2000.
[9] Sun S., Tan Z., Zhou C., Zhang M. & Zhang H., “Effect of ABS grafting degree and compatibilization on the properties of PBT/ABS blends”, Polymer Composite, Vol. 28, No. 4, pp. 482-492, 2007.
 
 
Journal of Petroleum Research
Volume 19, Issue 59 - Serial Number 59
July and August 2010
Pages 61-66

Files

Share

How to cite

Statistics