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High‐Solid‐Content Emulsions of PVC: Scale‐Down of an Industrial Process for Enhanced Understanding of Particle Formation Part 3: Production of Bimodal Latexes
Author(s) -
McKenna T. F. L.,
Pascal T.,
Lys T.
Publication year - 2013
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201300048
Subject(s) - emulsion polymerization , pulmonary surfactant , polyvinyl chloride , emulsion , chemical engineering , particle (ecology) , particle size , particle size distribution , polymerization , chemistry , process (computing) , materials science , base (topology) , process engineering , polymer chemistry , organic chemistry , polymer , oceanography , engineering , geology , mathematical analysis , mathematics , computer science , operating system
A scale‐down study of an industrial reactor for the production of polyvinyl chloride (PVC) via an emulsion polymerization process was carried out in order to understand the cause of batch‐to‐batch variations in product quality. The results in Part 2 of this series of papers indicated that a large excess of base is required to control the particle size distribution (PSD) of the seed process. Here, it is demonstrated that the flow rate of the initiator and the second‐stage surfactant are the most important parameters for PSD control. Altering the time point at which the initiator and surfactant are injected allows controlling the relative volume fractions of large and small particles.