Surface modification and physical properties of various UHMWPE‐fiber‐reinforced modified epoxy composites

Lin, Shing-Jong; Han, J. L.; Yeh, Jen‐Taut; Chang, Feng‐Chih; Hsieh, K. H.

doi:10.1002/app.25735

Cited by 59 publications

(41 citation statements)

References 26 publications

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“…The primary loading mode on fibers used in protective equipment is axial tension; therefore, tensile experiments must be conducted at high strain rates that mimic loading rates that are seen in an impact event. UHMWPE fibers such as Dyneema and Spectra are notoriously difficult to grip for these tensile tests due to low surface energy [1], which has been reported by several authors [2,3].…”

Section: Introductionmentioning

confidence: 93%

Tensile Properties of Dyneema SK76 Single Fibers at Multiple Loading Rates Using a Direct Gripping Method

Sanborn

DiLeonardi

Weerasooriya

2014

J. dynamic behavior mater.

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Ultrahigh molecular weight polyethylene (UHMWPE) fibers such as Dyneema and Spectra are seeing more use in lightweight armor applications due to higher tensile strength and lower density compared to aramid fibers such as Kevlar and Twaron. Numerical modeling is used to improve the design of fiber-based composite protective systems. Material response such as tensile stress-strain of different constituents of composites must be studied under experimental conditions similar to strain rates experienced during ballistic events. UHMWPE fibers are difficult to grip by adhesive methods typically used for other fibers due to low surface energy. Based on previous studies, the ability to grip UHMWPE fibers using traditional adhesive methods is dependent on fiber diameter and is limited to smaller diameter fibers which could affect reported stress values. To avoid diameter restrictions and surface energy problems, a direct gripping method has been used to characterize Dyneema SK76 single fibers at quasistatic, intermediate, and high strain rates of 0.001, 1, and 1,000 s -1 , respectively. In an effort to understand the effect of defect distribution along a fiber on its tensile response, multiple gage length samples were studied at the different strain rates. In this paper, the dependence of fiber diameter and gage-length on failure strength is discussed as well as success rate of failures in the gage section with this gripping technique. A comparison of the tensile properties to previous studies is also explored in this study.

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Section: Introductionmentioning

confidence: 93%

Tensile Properties of Dyneema SK76 Single Fibers at Multiple Loading Rates Using a Direct Gripping Method

Sanborn

DiLeonardi

Weerasooriya

2014

J. dynamic behavior mater.

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“…However, the smooth and inert characteristics of the UHMWPE fiber surface usually result in a lack of interfacial covalent bonds and low interfacial strength in UHMWPE fiber‐reinforced epoxy composites. This property in turn affects the ultimate mechanical properties of composites …”

Section: Introductionmentioning

confidence: 99%

Interfacial evaluation of epoxy/carbon nanofiber nanocomposite reinforced with glycidyl methacrylate treated UHMWPE fiber

Ahmadi

Masoomi

Safi

et al. 2016

J of Applied Polymer Sci

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Interface interactions of fiber-matrix play a crucial role in final performance of polymer composites. Herein, in situ polymerization of glycidyl methacrylate (GMA) on the ultrahigh molecular weight polyethylene (UHMWPE) fibers surface was proposed for improving the surface activity and adhesion property of UHMWPE fibers towards carbon nanofibers (CNF)-epoxy nanocomposites. Chemical treatment of UHMWPE fibers was characterized by FTIR, XPS analysis, SEM, and microdroplet tests, confirming that the grafting of poly (GMA) chains on the surface alongside a significant synergy in the interfacial properties. SEM evaluations also exhibited cohesive type of failure for the samples when both GMA-treated UHMWPE fiber and CNF were used to reinforce epoxy matrix. Compared with unmodified composite, a 319% increase in interfacial shear strength was observed for the samples reinforced with both 5 wt % GMA-grafted UHMWPE and 0.5 wt % of CNF.

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“…Figure shows the FTIR spectra of as‐received and potassium permanganate treated UHMWPE fibers. The absorption peaks of 2916, 2848, 1462, and 718 cm −1 are attributed to methylene nonsymmetry stretch vibration, methylene symmetry stretch vibration, methylene nonsymmetry changing angle vibration, and methylene swing in plane vibration, respectively . Besides, 3 new bands are observed in potassium permanganate‐treated UHMWPE fibers spectrum, compared with as‐received UHMWPE fibers spectrum in Figure : they are a broad band around 3410 cm −1 that corresponds to the hydroxyl group (−OH), a band around 1664 cm −1 that corresponds to the oxygen‐based groups, and a band around 1107 cm −1 that is attributed to ―C―O asymmetrical stretching vibration.…”

Section: Resultsmentioning

confidence: 92%

Improved mechanical properties of epoxy composites reinforced with surface‐treated UHMWPE fibers

Huang

2017

Polymers for Advanced Techs

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The surface treatment of ultra‐high molecular weight polyethylene fiber using potassium permanganate and the mechanical properties of its epoxy composites were studied. After treatment, many changes were happened in the fiber surface: more O‐containing groups (―OH, ―C═O, and ―C―O groups), drastically decreased contact angles with water and ethylene glycol, slightly increased melting point and crystallinity, and formed cracks. Different contents (0.1–0.5 wt%) ultra‐high molecular weight polyethylene fibers/epoxy composites were prepared. The results indicated that the surface treatment decreased the tensile strength of epoxy composites, but increased the bending strength. When the fiber content was 0.3 wt%, the above properties reached the maximum. At the same fiber content, the interlaminar shear strength of the composites was increased by 26.6% up to the as‐received fiber composites. Dynamic mechanical analysis of the composites suggested the storage modulus and tanδ were decreased due to the surface treatment. Fractured surface analysis confirmed that the potassium permanganate treatment was effective in improving the interface interaction.

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Surface modification and physical properties of various UHMWPE‐fiber‐reinforced modified epoxy composites

Cited by 59 publications

References 26 publications

Tensile Properties of Dyneema SK76 Single Fibers at Multiple Loading Rates Using a Direct Gripping Method

Tensile Properties of Dyneema SK76 Single Fibers at Multiple Loading Rates Using a Direct Gripping Method

Interfacial evaluation of epoxy/carbon nanofiber nanocomposite reinforced with glycidyl methacrylate treated UHMWPE fiber

Improved mechanical properties of epoxy composites reinforced with surface‐treated UHMWPE fibers

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