Removal of ungrafted monomer from polypropylene-graft-maleic anhydride via supercritical carbon dioxide extraction.: An article from: Polymer Engineering and Science
Book Details
Author(s)Kelly Clark, Sunggyu Lee
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00084HDXU
ISBN-13978B00084HDX4
MarketplaceIndia 🇮🇳
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on September 1, 2004. The length of the article is 3449 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: The removal of spent initiator, excess initiator and unbound monomer from newly synthesized polypropylene-graft-maleic anhydride (PP-g-MA) has typically been carried out using Soxhlet extraction. Standard solvents used in the Soxhlet process are xylene, toluene, acetone or methanol. These chemicals are not only hazardous to some degree, but also lead to undesirable maleic anhydride (MA) ring opening. This paper establishes that supercritical carbon dioxide (scC[O.sub.2]) extraction of residuals prevents anhydride ring opening and eliminates the need for post-extraction vacuum-drying of the copolymer product. An added benefit of this innovative process is that environmentally friendly carbon dioxide (C[O.sub.2]) is used in place of harmful solvents. The successful extraction of the residuals is established by thermogravimetric analysis (TGA). whereas FTIR spectroscopy is used to compare the anhydride content of Soxhlet-extracted PP-g-MA to that of scC[O.sub.2]-extracted copolymer. Polym. Eng. Sci. 44:1636-1641, 2004. [c] 2004 Society of Plastics Engineers.
Citation Details
Title: Removal of ungrafted monomer from polypropylene-graft-maleic anhydride via supercritical carbon dioxide extraction.
Author: Kelly Clark
Publication:Polymer Engineering and Science (Refereed)
Date: September 1, 2004
Publisher: Society of Plastics Engineers, Inc.
Volume: 44 Issue: 9 Page: 1636(6)
Distributed by Thomson Gale
From the author: The removal of spent initiator, excess initiator and unbound monomer from newly synthesized polypropylene-graft-maleic anhydride (PP-g-MA) has typically been carried out using Soxhlet extraction. Standard solvents used in the Soxhlet process are xylene, toluene, acetone or methanol. These chemicals are not only hazardous to some degree, but also lead to undesirable maleic anhydride (MA) ring opening. This paper establishes that supercritical carbon dioxide (scC[O.sub.2]) extraction of residuals prevents anhydride ring opening and eliminates the need for post-extraction vacuum-drying of the copolymer product. An added benefit of this innovative process is that environmentally friendly carbon dioxide (C[O.sub.2]) is used in place of harmful solvents. The successful extraction of the residuals is established by thermogravimetric analysis (TGA). whereas FTIR spectroscopy is used to compare the anhydride content of Soxhlet-extracted PP-g-MA to that of scC[O.sub.2]-extracted copolymer. Polym. Eng. Sci. 44:1636-1641, 2004. [c] 2004 Society of Plastics Engineers.
Citation Details
Title: Removal of ungrafted monomer from polypropylene-graft-maleic anhydride via supercritical carbon dioxide extraction.
Author: Kelly Clark
Publication:Polymer Engineering and Science (Refereed)
Date: September 1, 2004
Publisher: Society of Plastics Engineers, Inc.
Volume: 44 Issue: 9 Page: 1636(6)
Distributed by Thomson Gale
