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C7 Novel Fluorinated Mechanochemical Devulcanized Ground Rubber Tire

Wednesday, October 12, 2011: 3:40 PM
Meeting Room #14 (The I-X Center)
Sriram Yagneswaran1, Benjamin Lund1, Taylor Ware2, Neetu Tomar3, Walter Voit4 and Dennis Smith Jr.1, (1)Department of Chemistry, The University of Texas at Dallas, Richardson, TX, (2)Department of material science and engineering, The University of Texas at Dallas, Richardson, TX, (3)Dept. Of Chemsitry, Clemson University, Clemson, SC, (4)The University of Texas at Dallas, The University of Texas at Dallas, Richardson, TX
Novel surface modification of mechanochemical devulcanized ground rubber tire particles (GRT) was carried out by direct fluorination with fluorine gas at ambient temperature. Influence of various fluorinating parameters such as fluorine partial pressure and fluorination duration on GRT was studied. The surface characterization of fluorinated GRT (F-GRT) was done by ATR-FTIR, XPS, and SEM-EDXS. To study the effect of F-GRT in epoxy, the F-GRT filled epoxy composites have been evaluated by varying F-GRT content from 0 to 12 phr. Improved modulus was observed by dynamic mechanical analysis (DMA) and step change in heat capacity at glass transition temperature (Tg ) using differential scanning calorimetry (DSC). The DMA study shows the dependence of storage modulus (E’), loss modulus (E”), and tan δ parameters on

 F-GRT loading level in epoxy and six fold increases in E’ was observed at 12 phr composition as compared to the neat epoxy matrix.  

Keywords: Direct Fluorination; F-GRT/epoxy composite; ATR-FTIR; DMA; DSC; XPS

Contact Information

ACS Rubber Division
rubber@confex.com
http://www.rubber.org/meetings/fall.htm