Ballistic impact performance of composite laminates based on high‐density polyethylene/montmorillonite nanocomposite and Aramide fiber

2021 ◽  
Author(s):  
Rafael R. Dias ◽  
Ademir J. Zattera ◽  
Iaci M. Pereira ◽  
Bluma G. Soares
Keyword(s):  
Composite Laminates ◽  
High Density Polyethylene ◽  
High Density ◽  
Ballistic Impact ◽  
Impact Performance ◽  
Aramide Fiber

scholarly journals Enhanced Water Resistance of Recycled Newspaper/High Density Polyethylene Composite Laminates via Hydrophobic Modification of Newspaper Laminas

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 421
Author(s):  
Binwei Zheng ◽  
Weiwei Zhang ◽  
Litao Guan ◽  
Jin Gu ◽  
Dengyun Tu ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Photoelectron Spectroscopy ◽  
Composite Laminates ◽  
High Density Polyethylene ◽  
Water Resistance ◽  
Laminated Composite ◽  
High Strength ◽  
High Water ◽  
High Density ◽  
X Ray

A high strength recycled newspaper (NP)/high density polyethylene (HDPE) laminated composite was developed using NP laminas as reinforcement and HDPE film as matrix. Herein, NP fiber was modified with stearic acid (SA) to enhance the water resistance of the NP laminas and NP/HDPE composite. The effects of heat treatment and SA concentration on the water resistance and tensile property of NP and composite samples were investigated. The chemical structure of the NP was characterized with X-ray diffractometer, X-ray photoelectron spectroscopy and attenuated total reflectance Fourier transform infrared spectra techniques. The surface and microstructure of the NP sheets were observed by scanning electron microscopy. An expected high-water resistance of NP sheets was achieved due to a chemical bonding that low surface energy SA were grafted onto the modified NP fibers. Results showed that the hydrophobicity of NP increased with increasing the stearic acid concentration. The water resistance of the composite laminates was depended on the hydrophobicity of the NP sheets. The lowest value of 2 h water absorption rate (3.3% ± 0.3%) and thickness swelling rate (2.2% ± 0.4%) of composite were obtained when the SA concentration was 0.15 M. In addition, the introduction of SA can not only enhance the water resistance of the composite laminates, but also reduce the loss of tensile strength in wet conditions, which shows potential in outdoor applications.

Relationships between impact performance and structures of rotationally molded crosslinked high‐density polyethylene

2020 ◽  
Author(s):  
Yueqing Ren ◽  
Xiaojie Sun ◽  
Yafei Li ◽  
Lanlan Chen ◽  
Miaomiao Sun ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Impact Performance

scholarly journals Development and characterisation of multi-layered jute fabric-reinforced HDPE composites

2019 ◽  
Vol 54 (14) ◽  
pp. 1831-1845 ◽  
Author(s):  
Abu Sadat Muhammad Sayem ◽  
Julfikar Haider ◽  
MM Alamgir Sayeed
Keyword(s):  
Composite Laminates ◽  
High Density Polyethylene ◽  
Mechanical Performance ◽  
Microscopic Analysis ◽  
High Density ◽  
Thermoplastic Composite ◽  
Mechanical Resistance ◽  
Polyethylene Matrix ◽  
Jute Fabric ◽  
Jute Fabrics

The bast fibres, a subgroup of natural fibre family, have emerged as a strong competitor of widely used man-made glass fibre for use as fillers or reinforcing materials in certain types of composite materials, which do not require very high mechanical resistance. This paper investigates the manufacturing of multi-layered jute fabric-reinforced thermoplastic composite and its mechanical performance. Hessian jute fabrics in two, four and six layers without any pre-treatment were sandwiched in 0° orientation into seven layers of high-density polyethylene sheets and pressed at high temperature and pressure to form composite laminates having three different structural designs. The laminates with two, four and six layers contain approximately 6.70 wt%, 12.90 wt% and 18.50 wt% of jute fibres, respectively. Mechanical performance of the composite laminates having four and six layers of jute fabric was found to have improved significantly when compared to the pure high-density polyethylene laminates. Within a given sample thickness of 6.5 mm, the laminate with six layers of jute fabric exhibited the best mechanical performance. Optical microscopic analysis revealed that the yarn orientation of the fabrics within the composites remained stable, and there was no visible void in the laminate structure. Fracture morphology of the composite investigated by a scanning electron microscope showed good adhesion of the jute fabrics with the high-density polyethylene matrix.

scholarly journals Alkali Treatment Effect on the Tensile and Impact Properties of Recycled High-Density Polyethylene Composites Reinforced with Short Cantala Fiber

2020 ◽  
Vol 55 (3) ◽  
Author(s):  
Wijang Wisnu Raharjo ◽  
Bambang Kusharjanto ◽  
Teguh Triyono
Keyword(s):  
High Density Polyethylene ◽  
Alkali Treatment ◽  
High Density ◽  
X Ray Diffraction ◽  
Fiber Morphology ◽  
Impact Properties ◽  
Impact Performance ◽  
Naoh Solution ◽  
Fiber Matrix ◽  
Polyethylene Composites

In this study, an environmentally friendly composite was prepared from cantala fiber and recycled high-density polyethylene. Alkali treatment was utilized to improve the fiber–matrix interface of cantala fiber. The alkali treatment was carried out with a 2% NaOH solution for periods of 0, 4, 8, 12, 16, 20, and 24 hours. Various recycled high-density polyethylene composites reinforced with treated and untreated short cantala fiber were produced by hot press. The tensile and impact properties of the composites were examined to reveal the effect of alkali treatment. Changes in fiber–matrix bonding were investigated via composite fractography using scanning electron microscopy. A study of fiber morphology and other supporting tests, such as the fiber tensile test, X-ray diffraction, and Fourier transform infrared microscopy were also carried out. The results show that the addition of alkali-treated fiber to recycled high-density polyethylene composites enhanced the composites’ tensile and impact performance: Tensile strength improved by 15.5% and impact strength by 24.8%.

Composition and Surface Topography Effects on Apatite-Forming Ability of Ceramic-Polymer Composites

2003 ◽  
Vol 774 ◽  
Author(s):  
Susan M. Rea ◽  
Serena M. Best ◽  
William Bonfield
Keyword(s):  
Surface Topography ◽  
High Density Polyethylene ◽  
High Density ◽  
Apatite Layer ◽  
Biologically Active ◽  
Human Blood Plasma ◽  
Apatite Formation ◽  
Polyethylene Matrix ◽  
Composite Surface ◽  
X Ray

AbstractHAPEXTM (40 vol% hydroxyapatite in a high-density polyethylene matrix) and AWPEX (40 vol% apatite-wollastonite glass ceramic in a high density polyethylene matrix) are composites designed to provide bioactivity and to match the mechanical properties of human cortical bone. HAPEXTM has had clinical success in middle ear and orbital implants, and there is great potential for further orthopaedic applications of these materials. However, more detailed in vitro investigations must be performed to better understand the biological interactions of the composites and so the bioactivity of each material was assessed in this study. Specifically, the effects of controlled surface topography and ceramic filler composition on apatite layer formation in acellular simulated body fluid (SBF) with ion concentration similar to those of human blood plasma were examined. Samples were prepared as 1 cm × 1 cm × 1 mm tiles with polished, roughened, or parallel-grooved surface finishes, and were incubated in 20 ml of SBF at 36.5 °C for 1, 3, 7, or 14 days. The formation of a biologically active apatite layer on the composite surface after immersion was demonstrated by thin-film x-ray diffraction (TF-XRD), environmental scanning electron microscopy (ESEM) imaging and energy dispersive x-ray (EDX) analysis. Variations in sample weight and solution pH over the period of incubation were also recorded. Significant differences were found between the two materials tested, with greater bioactivity in AWPEX than HAPEXTM overall. Results also indicate that within each material the surface topography is highly important, with rougher samples correlated to earlier apatite formation.

Enhanced Tensile Properties of Stone Wool Fiber-Reinforced High Density Polyethylene (HDPE) Composites

2014 ◽  
Vol 56 (2) ◽  
pp. 150-154 ◽  
Author(s):  
Mallisi Sivarao ◽  
Aidy Ali ◽  
L. S. Teng
Keyword(s):  
Tensile Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Wool Fiber ◽  
Fiber Reinforced ◽  
Stone Wool
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