NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(1) [January 2010] >

Title: Increasing PVAc emulsion polymerization productivity-an industrial application
Authors: Sood, Ashwini
Keywords: Emulsion polymerization
Issue Date: Jan-2010
Publisher: CSIR
Abstract: A major objective in the operation of emulsion polymerization processes is that of faster and safer operation with consistent polymer product quality. The reaction is very fast and highly exothermic. This puts a constraint on the speed of the reaction, due to the limited heat removal capacity of the cooling jacket. The high viscosities of the latexes produced in many industrial processes aggravate the heat-removal problems. A systematic, experimental study in a 50 L pilot reactor is conducted where the monomer feed time is changed from 5.5 h to 2.5 h in various runs. The final samples are characterized for various properties which include appearance of emulsion, %solids, particle size, viscosity, pH, free monomer, film appearance and the application property which in this case is the bending length. The final viscosities are in the range of 300-500 poise. The reactor temperature during these runs could be safely controlled between 76-80°C. With decreasing monomer feed time, the final product shows improved application property and lower viscosity. The samples are withdrawn during the course of polymerization for two runs and analyzed for various properties. These provide fundamental understanding about the polymerization process. In conclusion, 30% reduction in batch time is possible.
Page(s): 34-42
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.17(1) [January 2010]

Files in This Item:

File Description SizeFormat
IJCT 17(1) 34-42.pdf172.99 kBAdobe PDFView/Open
 Current Page Visits: 1226 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 171212 since 01-Sep-2015  Last updated on 30-Jun-2016Webmaster: