scholarly journals Mechanical, Degradation and Water Uptake Properties of Fabric Reinforced Polypropylene Based Composites: Effect of Alkali on Composites

Fibers ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 94 ◽  
Author(s):  
Mohammad Bellal Hoque ◽  
Solaiman ◽  
A.B.M. Hafizul Alam ◽  
Hasan Mahmud ◽  
Asiqun Nobi
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Bending Strength ◽  
Matrix Material ◽  
Tensile Modulus ◽  
Mechanical Degradation ◽  
Bending Modulus ◽  
Alkali Solutions ◽  
Polypropylene Sheet ◽  
Water Absorption Test

In this study, a fabric was manufactured consisting of 50% pineapple, 25% jute and 25% cotton fibers by weight, to make composites using polypropylene (PP) as a matrix material. We used compression molding technique, which kept 30% of the fabric content by total weight as the composite. The tensile strength (TS), tensile modulus (TM), elongation break (Eb%), bending strength (BS) and bending modulus (BM) were investigated. From analyzed data, it was found that the composite values of TS, TM, Eb%, BS and BM were 58 MPa, 867 MPa, 22.38%, 42 MPa and 495 MPa, respectively. The TS, TM, Eb%, BS and BM of the neat polypropylene sheet were 28 MPa, 338 MPa, 75%, 20 MPa and 230 MPa, respectively. Due to fabric reinforcement, composite values for TS, TM, BS and BM increased 107%, 156%, 110% and 115%, respectively in comparison with a polypropylene sheet. A water absorption test was performed by dipping the composite samples in deionized water and it was noticed that water absorption was lower for PP-based composites. For investigating the effect of alkali, we sunk the composites in a solution containing 3%, 5% and 7% sodium hydroxide alkali solutions by weight, for 60 min after which their mechanical properties were investigated. A degradation test was carried out by putting the samples in soil for six months and it was noticed that the mechanical properties of fabric/PP composites degraded slowly.

scholarly journals Fabrication, Mechanical Characterization and Interfacial Properties of Okra Fiber Reinforced Polypropylene Composites

2018 ◽  
Vol 3 (1) ◽  
pp. 18-31 ◽  
Author(s):  
A.N.M. Masudur Rahman ◽  
Shah Alimuzzaman ◽  
Ruhul Amin Khan ◽  
Md. Ershad Khan ◽  
Sheikh Nazmul Hoque
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Matrix Material ◽  
Tensile Modulus ◽  
Fiber Composites ◽  
Interfacial Property ◽  
Soil Medium ◽  
Polypropylene Composites ◽  
Bending Modulus ◽  
Okra Fiber

In this study, an attempt has been taken to manufacture okra fiber (OF) composites with varying the fiber content ranging from 25-65% on total weight of the composites and polypropylene (PP) was preferred as matrix material. To fabricate the composites untreated and mercerized fibers were selected. A systematic study was done to observe the mechanical behaviors of the composites such as tensile, impact and bending properties. It was found that treated (mercerized) fiber composites exhibited improved mechanical properties than that of untreated fiber composites. Maximum tensile strength (TS) and bending strength (BS) was examined 38.5 MPa and 72.5 MPa respectively, whereas the highest tensile modulus (TM) and bending modulus (BM) was observed 675 MPa and 5.4 GPa respectively. The optimum impact strength (IS) and hardness value was found to be 22.87 KJ/m2 and 97 (Shore-A) for mercerized fiber composites containing 45% fiber. The composite samples were exposed to different intensities of γ radiation (2.5 kGy–10.0 kGy) and found significant improvement in the mechanical properties up to 5.0 kGy dose. Water absorption, degradation properties due to heat and soil medium of the composites were also performed. The interfacial property was examined by Microscopic Projector and Scanning Electron Microscope (SEM) and found that the interfacial bonding between matrix material and fiber was enhanced due to the treatment of fibers which authenticate the found mechanical characteristics of the composites.

Fabrication and Characterization of E-Glass Fiber Reinforced Unsaturated Polyester Resin Based Composite Materials

2019 ◽  
Vol 24 ◽  
pp. 1-7
Author(s):  
Md. Naimul Islam ◽  
Harun Ar-Rashid ◽  
Farhana Islam ◽  
Nanda Karmaker ◽  
Farjana A. Koly ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Bending Strength ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Tensile Modulus ◽  
Unsaturated Polyester Resin ◽  
Fiber Reinforced ◽  
Bending Modulus

E-glass fiber mat reinforced Unsaturated Polyester Resin (UPR)-based composites were fabricated by conventional hand lay-up technique. The fiber content was varied from 5 to 50% by weight. Mechanical properties (tensile and bending) of the fabricated composites were investigated. The tensile strength (TS) of the 5% and 50% fiber reinforced composites was 32 MPa and 72 MPa, respectively. Similarly, tensile modulus, bending strength and bending modulus of the composites were increased by the increase of fiber loading. Interfacial properties of the composites were investigated by scanning electron microscopy (SEM) and the results revealed that the interfacial bond between fiber and matrix was excellent. Keywords: Unsaturated Polyester Resin, Mechanical Properties, E-glass Fibers, Composites, Polymer.

scholarly journals Short Jute Fiber Reinforced Polypropylene Composites: Effect of Nonhalogenated Fire Retardants

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Sk. Sharfuddin Chestee ◽  
Pinku Poddar ◽  
Tushar Kumar Sheel ◽  
Md. Mamunur Rashid ◽  
Ruhul A. Khan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Ignition Time ◽  
Tensile Modulus ◽  
Jute Fiber ◽  
Flame Height ◽  
Firing Time ◽  
Fire Retardants ◽  
Fiber Reinforced ◽  
Bending Modulus

Short jute fiber reinforced polypropylene (PP) composites were prepared using a single screw extrusion moulding. Jute fiber content in the composites is optimized with the extent of mechanical properties, and composites with 20% jute show higher mechanical properties. Dissimilar concentrations of several fire retardants (FRs), such as magnesium oxide (MO), aluminum oxide (AO), and phosphoric acid (PA), were used in the composites. The addition of MO, AO, and PA improved the fire retardancy properties (ignition time, flame height, and total firing time) of the composites. Ignition time for 30% MO, flame height for 30% PA, and total firing time for 20% MO content composites showed good results which were 8 sec, 1 inch, and 268 sec, respectively. Mechanical properties (tensile strength, tensile modulus, bending strength, bending modulus, and elongation at break), degradation properties (soil test, weathering test, and percentage of weight loss), and water uptake were studied.

Fabrication and Characterization of Pineapple Fiber-Reinforced Polypropylene Based Composites

2018 ◽  
Vol 21 ◽  
pp. 31-42 ◽  
Author(s):  
Mohammad Bellal Hoque ◽  
M. Sahadat Hossain ◽  
Abdul M. Nahid ◽  
Solaiman Bari ◽  
Ruhul A. Khan
Keyword(s):  
Bending Strength ◽  
Sodium Hydroxide Solution ◽  
Matrix Material ◽  
Group Analysis ◽  
Tensile Modulus ◽  
Elongation At Break ◽  
Bending Modulus ◽  
The Matrix ◽  
Functional Group Analysis

Pineapple Leaf Fiber (PALF)-reinforced polypropylene (PP) based composites were prepared successfully by conventional compression molding technique. Different percentages (25,30,35, 40 and 405% by weight) of fiber were used to prepare composites. Tensile Strength (TS), Tensile Modulus (TM), Elongation at Break (Eb %), Bending Strength (BS), Bending Modulus (BM) and Impact Strength (IS) were evaluated. The 45 wt% PALF/PP composite exhibited an increase of 132% TS, 412% TM, 155% BS, 265% BM, and 140% IS with respect to the matrix material (PP). Fourier Transform Infrared (FTIR) Spectroscopy was employed for functional group analysis of PALF/PP composites. For all percentages of fiber, the composites demonstrated lower water uptake. The fabricated composites were immersed in alkali solution (Sodium hydroxide solution, 3%, 5% and 7% by weight) for 60 min and showed low TS, TM and Eb% compared to control composites.

Thermo-mechanical, Degradation, and Interfacial Properties of Jute Fiber-reinforced PET-based Composite

2011 ◽  
Vol 24 (6) ◽  
pp. 889-898 ◽  
Author(s):  
T. Huq ◽  
A. Khan ◽  
T. Akter ◽  
N. Noor ◽  
K. Dey ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Soil Degradation ◽  
Bending Strength ◽  
Tensile Modulus ◽  
Jute Fiber ◽  
Mechanical Degradation ◽  
Fiber Reinforced ◽  
Elongation At Break ◽  
Bending Modulus ◽  
Scanning Electron

Jute fiber-reinforced polyethylene terephthalate (PET) matrix composite was prepared by compression molding. Tensile strength (TS), tensile modulus (TM), elongation at break (Eb%), bending strength (BS), bending modulus (BM), impact strength (IS), and hardness of the composites (50% fiber by weight) were found to be 56 MPa, 1950 MPa, 5%, 73 MPa, 3620 MPa, 24 kJ/m2, and 97 Shore-A, respectively. After 6 weeks of soil degradation, composites lost 28.5% and 24.6% of their original TS and BS, respectively. Interfacial characterization was performed by scanning electron microscope.

scholarly journals Propriedades mecânicas de tijolos fabricados com solo e água residuária de mandioca

2015 ◽  
Vol 10 (2) ◽  
pp. 213-217 ◽  
Author(s):  
N. C. de Araújo ◽  
A. P. Ramos ◽  
A. J. P. Queiroz ◽  
R. C. dos Santos ◽  
J. Da S. Buriti
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Natural Resources ◽  
Water Absorption ◽  
Ceramic Material ◽  
Manufacturing Process ◽  
Bending Strength ◽  
Ceramic Blocks ◽  
Ceramic Paste ◽  
Bodies Of Evidence

A vantagem do processo de fabricação de tijolos com manipueira é ser ecologicamente correto, pois não consome água, nem há necessidade de ir ao forno, economizando recursos naturais e fazendo uso de um efluente altamente poluente. Assim, este trabalho objetivou analisar as propriedades mecânicas de tijolos fabricados com solo associado à manipueira como alternativa sustentável. Foram avaliados os parâmetros absorção de água e resistência à flexão. Em conformidade com os resultados, observou-se que as massas cerâmicas apresentaram valores de absorção de água da ordem de 10 a 13 %, valores aceitáveis para fabricação de blocos cerâmicos e valores de resistência a flexão adequados para fabricação de tijolos maciços, tanto, os corpos de prova com queima quanto os corpos de provas sem queima. Assim, conclui-se que a troca da água pela adição da manipueira na massa cerâmica não interfere nas propriedades mecânicas e esta pode ser adicionada a massa cerâmica para fabricação de tijolos ecológicos através do processo de prensagem.Mechanical properties of manufactured bricks with soil and cassava wastewaterAbstract: The advantage of the manufacturing process of brick with cassava is being environmentally friendly because it does not consume water, and there is no need to go to the oven, saving natural resources and making use of a highly polluting effluent. This work aimed to analyze the mechanical properties of bricks made from soil associated with cassava as a sustainable alternative. Parameters were evaluated water absorption and flexural strength. In accordance with the results, it was observed that the ceramic material provided water absorption values of the order of 10 to 13%, acceptable values for manufacturing ceramic blocks and bending strength values suitable for manufacture of solid bricks, both proof bodies test with burns as the proof bodies of evidence without burning. It is therefore concluded that the replacement of water by the addition of cassava the ceramic mass does not interfere with the mechanical properties and that can be added to the ceramic paste for manufacturing green bricks through the pressing process.

scholarly journals Effect of Gamma Radiation on the Mechanical Properties of Natural Fabric Reinforced Polyester Composites

2019 ◽  
Vol 27 (4(136)) ◽  
pp. 88-93
Author(s):  
K.Z.M. Abdul Motaleb ◽  
Md Shariful Islam ◽  
Rimvydas Milašius
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Gamma Radiation ◽  
Bending Strength ◽  
Polyester Resin ◽  
Radiation Doses ◽  
Elongation At Break ◽  
Bending Modulus ◽  
Polyester Composites

Two types of composites:(1) pineapple fabric reinforced polyester resin (Pineapple/PR) and (2) jute fabric reinforced polyester resin (Jute/PR) were prepared and the mechanical properties investigated for various gamma radiation doses ranging from 100-500 krad. Properties like tensile strength, Young’s modulus, elongation-at-break, bending strength, bending modulus and impact strength were increased significantly by 19%, 32%, 45%, 32%, 47% and 20%, respectively, at a dose of 300 krad for Pineapple/PR, and by 47%, 49%, 42%, 45%, 52% and 65%, respectively, at a dose of 200 krad for the Jute/PR composite in comparison to the non-irradiated composite. Gamma radiation improved the mechanical properties, but overdoses of radiation even caused a reduction in them.

An attempt to use „Tetra Pak” waste material in particleboard technology

2021 ◽  
Vol 114 ◽  
pp. 70-75
Author(s):  
Radosław Auriga ◽  
Piotr Borysiuk ◽  
Alicja Auriga
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Core Layer ◽  
Waste Material ◽  
Thickness Swelling ◽  
The Core ◽  
Tetra Pak ◽  
The Impact

An attempt to use „Tetra Pak” waste material in particleboard technology. The study investigates the effect of addition Tetra Pak waste material in the core layer on physical and mechanical properties of chipboard. Three-layer chipboards with a thickness of 16 mm and a density of 650 kg / m3 were manufactured. The share of Tetra Pak waste material in the boards was varied: 0%, 5%, 10% and 25%. The density profile was measured to determine the impact of Tetra Pak share on the density distribution. In addition, the manufactured boards were tested for strength (MOR, MOE, IB), thickness swelling and water absorption after immersion in water for 2 and 24 hours. The tests revealed that Tetra Pak share does not affect significantly the value of static bending strength and modulus of elasticity of the chipboard, but it significantly decreases IB. Also, it has been found that Tetra Pak insignificantly decreases the value of swelling and water absorption of the chipboards.

Mechanical and Interfacial Characterization of Jute Fabrics Reinforced Unsaturated Polyester Resin Composites

2019 ◽  
Vol 25 ◽  
pp. 22-31 ◽  
Author(s):  
Farhana Islam ◽  
M. Naimul Islam ◽  
Shahirin Shahida ◽  
Harun Ar Rashid ◽  
Nanda Karmaker ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Bending Strength ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Tensile Modulus ◽  
Unsaturated Polyester Resin ◽  
Bending Modulus ◽  
The Matrix ◽  
Jute Fabrics

Jute fabrics reinforced Unsaturated Polyester Resin (UPR)-based composites were prepared by conventional hand lay-up technique. Different proportions (5 to 50% by weight) of fibre content was used in preparation of the composite. Tensile Strength (TS), Tensile Modulus (TM), Bending Modulus (BM), Bending Strength (BS), Impact Strength (IS) of the fabricated composites were studied. Upon each addition of fiber content in the matrix, mechanical properties of the composites were increased. The Tensile Strength (TS) of the 5% and 50% fiber reinforced composites was 18 MPa and 42 MPa respectively. Scanning Electron Microscopy (SEM) showed interfacial properties of the composites and it was revealed that the bond between fiber and matrix was excellent.

scholarly journals Thermal Action on Normal and High Strength Cement Mortars

2020 ◽  
Vol 10 (18) ◽  
pp. 6455
Author(s):  
Marianela Ripani ◽  
Hernán Xargay ◽  
Ignacio Iriarte ◽  
Kevin Bernardo ◽  
Antonio Caggiano ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Peak Load ◽  
Physical And Mechanical Properties ◽  
Thermal Action ◽  
High Strength ◽  
Strength Loss ◽  
Brittle Behavior ◽  
Cement Mortars ◽  
Water Absorption Test

High temperature effect on cement-based composites, such as concrete or mortars, represents one of the most important damaging process that may drastically affect the mechanical and durability characteristics of structures. In this paper, the results of an experimental campaign on cement mortars submitted to high temperatures are reported and discussed. Particularly, two mixtures (i.e., Normal (MNS) and High Strength Mortar (MHS)) having different water-to-binder ratios were designed and evaluated in order to investigate the incidence of both the mortar composition and the effects of thermal treatments on their physical and mechanical properties. Mortar specimens were thermally treated in an electrical furnace, being submitted to the action of temperatures ranging from 100 to 600 °C. After that and for each mortar quality and considered temperature, including the room temperature case of 20 °C, water absorption was measured by following a capillary water absorption test. Furthermore, uniaxial compression, splitting tensile and three-points bending tests were performed under residual conditions. A comparative analysis of the progressive damage caused by temperature on physical and mechanical properties of the considered mortars types is presented. On one hand, increasing temperatures produced increasing water absorption coefficients, evidencing the effect of thermal damages which may cause an increase in the mortars accessible porosity. However, under these circumstances, the internal porosity structure of lower w/b ratio mixtures results much more thermally-damaged than those of MNS. On the other hand, strengths suffered a progressive degradation due to temperature rises. While at low to medium temperatures, strength loss resulted similar for both mortar types, at higher temperature, MNS presented a relatively greater strength loss than that of MHS. The action of temperature also caused in all cases a decrease of Young’s Modulus and an increase in the strain corresponding to peak load. However, MHS showed a much more brittle behavior in comparison with that of MNS, for all temperature cases. Finally, the obtained results demonstrated that mortar quality cannot be neglected when the action of temperature is considered, being the final material performance dependent on the physical properties which, in turn, mainly depend on the mixture proportioning.

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