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Polymers 2017, 9(4), 143; doi:10.3390/polym9040143

Simple Synthesis of Hydroxyl and Ethylene Functionalized Aromatic Polyamides as Sizing Agents to Improve Adhesion Properties of Aramid Fiber/Vinyl Epoxy Composites

1
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
2
School of Materials Engineer, Shanghai University of Engineering Science, Shanghai 201620, China
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Authors to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 22 March 2017 / Revised: 16 April 2017 / Accepted: 18 April 2017 / Published: 20 April 2017
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Abstract

To improve interfacial adhesion between aramid fibers and vinyl epoxy resins, a series of hydroxyl and ethylene-functional aromatic polyamides ((ClPPTA)m-R′) with different chain segments were successfully synthesized via a one-pot low-temperature polycondensation. The hydroxyl and ethylene-functional aromatic polyamides were characterized by Fourier transform infrared spectroscopy (FT-IR), solid-state 13C CP/MAS nuclear magnetic resonance spectroscopy (13C CP/MAS NMR), thermal gravimetric analysis (TGA), and wide-angle X-ray diffraction (WXRD). The contact angle of the hydroxyl and ethylene-functional aromatic polyamides films were measured. The hydroxyl and ethylene-functional aromatic polyamides were used as the sizing agents for aramid fiber/vinyl epoxy composites. The surface chemical composition and morphology of the unsized and sized fibers were identified using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The interfacial adhesion between aramid fibers and vinyl epoxy composites was investigated by the micro-debond tests. The results showed that the interfacial shear strength between the sized aramid fibers and vinyl epoxy composites was greatly improved. View Full-Text
Keywords: aramid fibers; sizing agents; vinyl epoxy composites; adhesion properties aramid fibers; sizing agents; vinyl epoxy composites; adhesion properties
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Qin, M.; Kong, H.; Zhang, K.; Teng, C.; Yu, M.; Liao, Y. Simple Synthesis of Hydroxyl and Ethylene Functionalized Aromatic Polyamides as Sizing Agents to Improve Adhesion Properties of Aramid Fiber/Vinyl Epoxy Composites. Polymers 2017, 9, 143.

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