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Investigation of the effect of delayed reflux on PVC grain properties produced by suspension polymerization
Author(s) -
Etesami N.,
Nasr Esfahany M.,
Bagheri R.
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32130
Subject(s) - materials science , polyvinyl chloride , plasticizer , suspension (topology) , suspension polymerization , composite material , polymerization , polyvinyl alcohol , reflux , particle (ecology) , chemical engineering , particle size distribution , particle size , polymer chemistry , polymer , medicine , oceanography , mathematics , disease , pathology , homotopy , pure mathematics , engineering , geology
The effects of the condenser operation on properties of polyvinyl chloride (PVC) particles produced by suspension polymerization process were investigated in a pilot scale reactor. It was observed that delaying reflux operation increased the cold plasticizer absorption of the final resin. Both bulk density and K‐value of the PVC powder decreased by increasing time delay in the reflux operation. It was also found that commencement of refluxing before 20% conversion resulted in bimodal particle size distribution (PSD), while monomodal PSD was obtained for longer delays in refluxing. SEM micrographs showed that surface of produced particles were rough and smooth when reflux started before and after 20% conversion, respectively. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010