Kinetics and Mechanism of Bulk Polymerization of Vinyl Chloride in a Polymerization Reactor

A. S. Ibrahim, Y. A. Ali, H. M. Saad, I. H. Amur

Abstract


Polyvinyl chloride (PVC) is the third most commonly produced polymer and is important because of its mechanical characteristics. The most common method of PVC manufacturing is the process of suspension. Although, there are several benefits associated with suspension, this study will focus on the bulk polymerization of vinyl chloride; highlight the physical and chemical properties of PVC, which can be changed through an estimation of the optimum ratio that exists between the hydrophilic and hydrophobic parts of the polymer’s surface, and propose a new mathematical model which will be helpful for the conversion of PVC into a useful form. The result will be the proposal of a new dynamic mathematical model for the three-phase structure model. All particles have been taken into account in the proposed model, which helped contribute to the reaction in gel, solid, and liquid phases, emphasizing the use of mercury (Hg) as a catalyst. The proposed mathematical model considers the heat and mass transfer between the liquid, gel, and solid phases with chemical reactions that occur between the liquid and solid phases, and between the gel and solid phases. The effect of the catalyst and volumetric flow rates of vinyl chloride monomer (VCM) on the system have been evaluated through the proposed mathematical model. Furthermore, the study’s experimental data have been compared with the findings of the suggested model in the context of concentration and temperature reaction. Obtained results show good agreement between the proposed mathematical model and the actual plant data.

 

 


Keywords


Mathematical model, Catalyst, Polymerization reactor, Chemical reaction, Heat and mass transfer.

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References


Ambrozek B, Nastaj J, Gabrus E (2012), Modeling of adsorptive drying of N-PVC. Drying Technology: An International Journal 30: 10.

Balakrishnan B, Kumar DS, Yoshida Y, Jayakrishnan A (2005), Chemical modification of PVC using poly ethylene glycol to improve blood compatibility. Biomaterials and Artificial Organs, 18(32): 6335–6342.

Blazevska-Gilev J, Spasesk D (2010), Formal kinetic analysis of PVC thermal degradation. Journal of the University of Chemical Technology and Metallurgy 45(3): 251-254.

Chattopadhyay S, Madras G (2002), Degradation of PVC properties. Polymer Degradation and Stability 71: 273–278.

Chavadej S, Phuaphromyod P, Gulari E, Rangsunvigit P, Sreethawong TM (2008), Photocatalytic degradation of 2-PVC by using Pt/TiO2 prepared by microemulsion technique, Chemical Engineering Journal 137(3): 489-495.

Cohan GF (1975), Industrial preparation of polyvinyl chloride. Environmental Health Perspectives 11: 53–57.

Field MA (1973), Predication of optimum temperature profiles for vinyl chloride polymerization using mathematical model. ICI Internal Report.

Ibrahem SA (2012), Chemical reaction engineering and design by using MATLAB software.

Saarbrücken, LAP Lambert Academic Publishing AG and Co.

Kamo T, Yamamoto Y, Miki K, Sato Y (2012), Conversion of waste PVC to useful chemicals, Report of National Institute for Resources and Environment.

Kiparissides C, Achilas DS, Chatzi E (1994), Dynamic simulation of primary particle size distribution in vinyl chloride polymerization. Journal of Applied Polymer Science 54: 1423–1438 .

Lathia JD, El-Sherif D, Wheatley MA (2004), Surface modification of polymeric contrast agents for cancer targeting. Pharmaceutical Engineering 23(6): 142-143.

Lăzăroaie C, Rusen E, Mărculescu B, Zecheru T, Hubcă G (2010), Chemical modification of PVC polymer matrices with special properties. UPB Science Bulletin 72(2): 127–140.

Maezawa Y, Tezuka F, Inoue Y (2004), Study and Evaluation of Kinetic Analysis Of PVC Thermal Degradation. Polymer Degradation and Stability 81(2): 187–196.

Scott DS, Czernik SR, Radlein DS (1990), Thermal analysis of PVC in the environment. Energy and Fuels 4(4): 407–411.

Zuga D, Cincu C (2006), Polymer composites by reclaiming rubber wastes resulting from finishing the rubberized rolls used in printing industry. UPB Science Bulletin, Series B, 68(1): 25-30.




DOI: http://dx.doi.org/10.24200/tjer.vol12iss2pp41-50

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Copyright (c) 2017 A. S. Ibrahim, Y. A. Ali, H. M. Saad, I. H. Amur

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