Effect of chemical functionalization on the mechanical properties of polypropylene hollow fiber membranes. Issue 20 (28th August 2014)

• Record Type: Journal Article
• Authors: Alexander, Joseph V.; Neely, James W.; Grulke, Eric A.
• Is Part Of: Journal of polymer science. Volume 52:Issue 20(2014:Oct. 15)
• Page Start: 1366
• Page End: 1373
• Publication Date: 2014-08-28
• Subjects: 547
• DOI: 10.1002/polb.23572
• Languages: English
• ISSNs: 0887-6266

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>Chemical treatment of polymeric hollow fiber membranes (HFMs) is used to prepare their exterior surfaces for coatings. Typical treatments can cleave both CC and CH bonds of polypropylene, leading to lower mechanical strength of the fibers. This study evaluated the yield strength, maximum strain, ultimate tensile strength, and burst strength of HFMs treated with each of three common oxidizing reagents: ozone as a gas phase system, aqueous solutions of potassium persulfate, and ammonium persulfate for liquid phase systems. The yield strength and ultimate tensile strength of HFMs decreased continuously with increasing ozonation time. Batch treatments with aqueous oxidizing systems showed limiting values of the yield and ultimate tensile strengths with time. Swelling the hollow fibers with methanol prior to oxidation caused less reduction of the mechanical properties after persulfate treatment. Fibers pretreated with methanol showed lower losses of mechanical properties strength with aqueous oxidation systems. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. <bold>2014</bold>, <italic>52</italic>, 1366–1373</p> </abstract>