Journal
RSC Advances
Volume 5, Issue 114, Pages 94351-94360Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra19161k
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Funding
- Natural Science Foundation of China [51373010, 51320105012, 51221002]
- National High Technology Research and Development Program [2012AA03A209]
- Program for New Century Excellent Talents in University [NCET-11-0562]
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In this research, ultraviolet (UV) irradiation induced graft polymerization of glycidyl methacrylate (GMA) was performed to modify the surface properties of poly-p-phenyleneterephthamide (PPTA) fibers. The improvement of adhesion with a rubber matrix was achieved due to the introduction of epoxy groups. The successful grafting of GMA on the PPTA fiber surface was ascertained by characterization using Xray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and scanning electron microscopy (SEM). The tensile properties of PPTA fibers after each stage of surface modification were determined by tensile testing of single-filaments. A singlefiber pull-out test was applied to evaluate the adhesion of PPTA fibers with the rubber matrix. The pullout force of grafted PPTA fibers exceeded that of the pristine fibers by 53.7%. Resorcinolformaldehyde-latex (RFL) dipping was applied to further improve the adhesion properties. As a result, the fibers with GMA grafting followed by RFL dipping exhibited a 80.8% improvement compared with the pristine fibers and achieved much higher adhesion strength with rubber matrix, compared to the PPTA fibers modified with conventional industrial method of isocyanate (NCO) and RFL two bath dipping.
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