A finite volume method is used to solve a determinist mathematical model and to analyze the performance of an alternative design for an emulsion polymerization reactor with internal angular baffles as static mixer. It is assumed to be' a steady-state, cylindrical one-dimensional model having a fully developed laminar plug flow. The Smith-Ewart model is used to estimate the monomer conversion, the kinetics is of Arrhenius type, and laminar finite-rate model is assumed to compute chemical source terms. The objective of this work is to develop the finite volume method for the new emulsion polymerization tubular reactor with internal angle baffles. The performance of the alternative reactor is compared with continuous tubular reactor with constant reaction temperature. The simulations were validated with experimental results for the isothermal and tubular reactor, with a good concordance. The results with baffles were better than without baffles in relation to desired properties such as particle size and viscosity. The problem is sufficiently well solved by finite volume method. (c) 2006 Wiley Periodicals, Inc.102660376048