Understanding the semicontinuous‐heterophase, surfactant‐supported, acrylamide inverse polymerization

In this work, a simple comprehensive mathematical model, to understand the main mechanisms occurring in the semicontinuous heterophase inverse polymerization of acrylamide, is reported. A Mayo‐Lewis extended model, including nucleation and coagulation, is assessed with experimental conversion, parti...

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Bibliographic Details
Published in:Polymer engineering and science 2018-12, Vol.58 (12), p.2219-2226
Main Authors: López‐Serrano, Francisco, Silva, Jorge M., Sánchez‐Díaz, Juan C., Vargas, René O., Puig, Jorge E.
Format: Article
Language:English
Subjects:
Acrylamide
Chemical properties
Coagulation
Conversion
Emulsion polymerization
Methods
Microemulsions
Nucleation
Particle density (concentration)
Polymerization
Polymers
Production processes
Radicals
Surface active agents
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Summary:In this work, a simple comprehensive mathematical model, to understand the main mechanisms occurring in the semicontinuous heterophase inverse polymerization of acrylamide, is reported. A Mayo‐Lewis extended model, including nucleation and coagulation, is assessed with experimental conversion, particle density and inferred average number of radicals versus time‐data at 60°C, at three monomer addition rates. It was found that: (1) the average number of radicals is much smaller than 0.5 contrary to most of inverse emulsion and microemulsion polymerization reports, this number increased steadily along the experiments, (2) coagulation does exist in this process, and (3) the exit rate coefficient was found to present a high value, agreeing with other authors that claim a large exit rate. Conversion, the bell‐shaped number of particles' evolution and number average radicals' concentration, versus time data, are well described by the proposed model. POLYM. ENG. SCI., 58:2219–2226, 2018. © 2018 Society of Plastics Engineers
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.24838