Polímeros: Ciência e Tecnologia
Polímeros: Ciência e Tecnologia
Original Article

Chemical resistance of core-shell particles (PS/PMMA) polymerized by seeded suspension

Ribeiro, Luiz Fernando Belchior; Gonçalves, Odinei Hess; Marangoni, Cintia; Motz, Günter; Machado, Ricardo Antonio Francisco

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Core-shell particles were produced on seeded suspension polymerization by using polystyrene (PS) as polymer core, or seed, and methyl methacrylate (MMA) as the shell forming monomer. Two synthesis routes were evaluated by varying the PS seed conversion before MMA addition. The main purpose of this work was to investigate the influence of synthesis routes on the morphology and chemical resistance of the resulting particles. 1 H NMR spectroscopy showed that the use of PS seeds with lower conversion led to the formation of higher amount of poly(styrene-co-MMA). The copolymer acted as a compatibilizer, decreasing the interfacial energy between both homopolymers. As a consequence, a larger amount of reduced PMMA cluster were formed, as was revealed by TEM measurements. Samples in this system showed enhanced resistance to cyclohexane attack compared with pure PS, with a PS extraction of only 37% after 54 hours test.


seeded suspension polymerization, poly(methyl methacrylate), polystyrene, suspension polymerization.


1. Vivaldo-Lima, E., Wood, P. E., Hamielec, A. E., & Penlidis, A. (1997). An updated review on suspension polymerization. Industrial & Engineering Chemistry Research, 36(4), 939-965. http://dx.doi.org/10.1021/ie960361g.

2. Dowding, P. J., & Vincent, B. (2000). Suspension polymerisation to form polymer beads.Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 161(2), 259-269. http://dx.doi.org/10.1016/S0927-7757(99)00375-1.

3. Scheirs, J., & Priddy, D. (2003). Modern styrenic polymers: polystyrenes and styrenic copolymers. Chichester: John Wiley & Sons, Ltd.

4. Brooks, B. W. (2005). Free-radical polymerization: suspension. In T. H. Meyer & J. Keurentjes (Eds.), Handbook of Polymer Reaction Engineering (pp. 213-247). Weinheim: Wiley-VCH Verlag GmbH.

5. Kotoulas, C., & Kiparissides, C. (2008). Suspension polymerization. In J.Asua (Ed.), Polymer Reaction Engineering (pp. 209-232). Oxford: Blackwell Publishing Ltd.

6. Gonçalves, O. H., Staudt, T., Araújo, P. H. H., & Machado, R. A. F. (2009). Foaming of poly(methyl methacrylate) particles. Materials Science and Engineering C, 29(2), 479-484. http://dx.doi.org/10.1016/j.msec.2008.08.034.

7. Brandrup, J., Immergut, E. H., & Grulke, E. A. (1999). Polymer handbook. New York: John Wiley & Sons, Inc.

8. Gonçalves, O. H., Asua, J. M., Araújo, P. H. H., & Machado, R. A. F. (2008). Synthesis of PS/PMMA core−shell structured particles by seeded suspension polymerization. Macromolecules, 41(19), 6960-6964. http://dx.doi.org/10.1021/ma800693m.

9. Gonçalves, O. H., Leimann, F. V., Araújo, P. H. H., & Machado, R. A. F. (2013). Expansion of core-shell PS/PMMA particles. Journal of Applied Polymer Science, 130(6), 4521-4527. http://dx.doi.org/10.1002/app.39731.

10. Heydarpoor, S., Abbasi, F., Jalili, K., & Najafpour, M. (2015). Synthesis of core-shell PS/PMMA expandable particles via seeded suspension polymerization. Journal of Polymer Research, 22(8), 151. http://dx.doi.org/10.1007/s10965-015-0789-0.

11. Machado, R. A. F., & Bolzan, A. (1998). Control of batch suspension polymerization reactor.Chemical Engineering Journal, 70(1), 1-8. http://dx.doi.org/10.1016/S1385-8947(98)00006-0.

12. Songkhla, P. N., & Wootthikanokkhan, J. (2002). Effect of the copolymer composition on the K and a constants of the Mark-Houwink equation: Styrene-methyl methacrylate random copolymers. Journal of Polymer Science. Part B, Polymer Physics, 40(6), 562-571. http://dx.doi.org/10.1002/polb.10119.

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