A model for styrene thermal polymerization process in tubular reactor has been developed starting from basic transport equation without adjustable parameters. Radical and axial changes in velocity and temperature were taken into consideration in this model. Various factors that affect monomer conversion and product quality such as dimensions of reactor

wall temperature

inlet temperature and inlet mass flow

were studied by computational simulation based on this model. The result show that reactor length

reactor diameter

wall temperature and inlet mass flow have significant effects on monomer conversion and quality of product. Whereas inlet temperature effect is much weaker.