The process,hardware configuration and software configuration of DCS controlling system for the production of PVC by bulk polymerization were introduced briefly as well as the main functions performed by the controlling system during the polymerization process.
The model can distinctly reflect the dynamic characteristics of polymerization process, which be applied triumphantly in the dynamic simulation of polymerization process validate the correctness of model.
(3) Using PS of crosslinking as seed', the apparrent active energy (Ea) of emulium polymerization of seed n-BA equals 80 kJ/mol, similar to the emulsion polymerization process of nBA itself under the same condition.
The PVC polymerization process was controlled comprehensively and optimumly by fully utilizing the powerful functions of DCS system and using such means as model control,fuzzy logic control,variable PID parameter control,program control,heat balance estimation control,series control and DCS inside blocking.
Suspension-emulsion combined polymerization process, in which methyl methacrylate (MMA) emulsion polymerization constituents were drop-wisely added to styrene (St) suspension polymerization system at the different stage of St polymerization, was applied to prepare bigger core-shell structure PS/PMMA composite particles.
The copolyimide was precipitated in m-cresol in the polymerization process when the molar ratio of MBTBA and PDA was lower than 6/4.
An application to a simulated batch MMA polymerization process demonstrates the effectiveness of the proposed method.
The swelling ratio of the produced poly(ST-co-NIPAM) colloids is similar to the swelling ratio found for similar poly(ST-co-NIPAM) colloids produced by the two-step seeded polymerization process.
It is revealed that the addition of the salt to the leaching acid solution leads to a fast polymerization process with the formation of weakly structurized silica gel.
It was shown that a change in the Al/Zr molar ratio enables one to vary the system activity, the kinetic characteristics of the polymerization process, and the properties of polypropylene over wide ranges.