Bonding characteristics of recycled polyethylene terephthalate (PET) fibers coated with maleic anhydride grafted polypropylene in cement-based composites

• Published in: Journal of applied polymer science Vol. 121; no. 4; pp. 1908 - 1915
• Main Authors: Won, Jong-Pil, Park, Chan-Gi, Lee, Su-Jin, Kang, Joo-Won
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.08.2011; Wiley; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Bonding; Cements; coatings; composites; Exact sciences and technology; Fibers; hydrophilic polymers; interfaces; Maleic anhydride; Materials science; Polyethylene terephthalates; Polymer industry, paints, wood; Polymer matrix composites; Polymers; Polypropylenes; Recycled; Technology of polymers; Waste treatment; Ethylene terephthalate polymer; Adhesivity; Propylene copolymer; interfaces; fibers; Olefin copolymer; Ester polymer; Coated fiber; Synthetic fiber; Experimental study; Composite material; Surface treatment; composites; hydrophilic polymers; coatings; Concentration effect; Surface properties; Maleic anhydride copolymer; Olefin polymer; Recycled material; Recycling
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.33747

In this study, we sought to enhance the bond performance between recycled polyethylene terephthalate(PET) fibers and cement‐based composites using a hydrophilization treatment with hydrophilic maleic anhydride grafted polypropylene (mPP). The bond performance was evaluated with bone‐shaped specimens after the hydrophilization treatment. The effects of the concentration of mPP in the solution in which the PET fibers were immersed (0, 5, 10, 15, and 20%) and the three types of shapes on the surface energy of the recycled PET fibers were evaluated. The pullout behavior, bond strength, and interfacial energy all increased with the concentration of mPP to 15% but decreased at 20%. This occurred because 15% mPP coated the recycled PET fiber thoroughly, whereas a 20% mPP coating resulted in partial cracks, which led to fractures on application of a pullout load. Of the fiber shapes, the embossed fibers demonstrated the best bond behavior. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011