scholarly journals STUDY OF THE EFFECT OF CHEMICAL TREATMENTS ON THE TENSILE BEHAVIOUR OF ABACA FIBER REINFORCED POLYPROPYLENE COMPOSITES

2014 ◽  
Vol 10 (6) ◽  
pp. 2814-2822
Author(s):  
Ramadevi Punyamurthy ◽  
Dhanalakshmi Sampathkumar ◽  
Basavaraju Bennehalli ◽  
Pramod V Badyankal
Keyword(s):  
Tensile Strength ◽  
Alkali Treatment ◽  
Tensile Tests ◽  
Tensile Behaviour ◽  
Fiber Reinforced ◽  
Compression Moulding ◽  
Polypropylene Composites ◽  
Chemical Treatments ◽  
Chloride Treatment ◽  
Benzene Diazonium

Abaca fibers were subjected to different chemical treatments like alkali treatment, permanganate treatment, acrylation & benzene diazonium chloride treatment and these chemically treated fibers were used as reinforcements in the preparation of polypropylene composites by hot compression moulding method. Various composites were fabricated with different fiber loadings of 20%, 30%, 40%, 50%, 60%, and 70%. Abaca composites with 40% fiber loadings were found to have optimum properties when tensile tests were carried out and the study also revealed that treated composites were found to have improved tensile properties when compared to untreated composites. Among all the treatments carried out benzene diazonium chloride treated abaca fiber reinforced polypropylene composites showed higher tensile strength. These composites showed 82.38% increase in tensile strength when compared to untreated composites for 40% fiber loading. 

Investigation of the Debonding Process in Wood Fiber Reinforced Polymer Composites by Acoustic Emission

2007 ◽  
Vol 537-538 ◽  
pp. 199-206 ◽  
Author(s):  
Z. Kocsis ◽  
Tibor Czigány
Keyword(s):  
Tensile Strength ◽  
Acoustic Emission ◽  
Wood Fiber ◽  
Damage Mechanism ◽  
Tensile Tests ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Fiber Reinforced Polymer Composites ◽  
Injection Molded ◽  
Ae Counts

Wood fiber reinforced polypropylene composites of different fiber contents without any treatment were prepared, and tensile tests were carried out on injection molded specimens. With increasing fiber content a decrease of the tensile strength was experienced. The weak adhesion at the fiber-matrix interface and the typical composite failures can be seen on SEM pictures. During the tests acoustic emission was monitored to get more information about the damage mechanism. From the AE counts distribution it can be concluded that the maximum number of AE counts decreases simultaneously with the tensile strength in case of the different composites.

Characteristics on Treated Kenaf Fiber Reinforced Polypropylene Composites

2017 ◽  
Vol 909 ◽  
pp. 94-99
Author(s):  
Muhammad Muslimin Husin ◽  
Mohammad Sukri Mustapa ◽  
Md. Saidin Wahab ◽  
Ahmad Mubarak Tajul Arifin ◽  
Reventheran A.L. Ganasan ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Natural Fiber ◽  
Alkali Treatment ◽  
Fiber Reinforced ◽  
Morphological Comparison ◽  
Kenaf Fiber ◽  
Polypropylene Composites ◽  
Composition Ratio ◽  
Tensile Performance ◽  
Test Press

Nowadays natural fiber and polymer matrix are being extensively used as alternatives in producing furniture like ceiling, floor and etc. to fulfill society demand instead of environmental friendly and saving cost. The objective of this study is to investigate the effects of maleic anhydride grafted polypropylene (MAPP) as a coupling agent for reinforcement between kenaf fiber (KF) and polypropylene (PP). The ratio of MAPP between 3% and 5% was observed to determine which composition ratio is better. The tensile strength for both 30% KF and 40% KF was treated through the alkali treatment process with 5% sodium hydroxide (NaOH). Kenaf fiber reinforced polypropylene (PP/KF) composites were melt blended and then used hydraulic molding test press machine for characterization to observe their tensile strengths by measuring their threshold. Tensile test was carried out to determine the tensile stresses of the composite at the best composition ratio of kenaf fiber that are 30% KF and 40% KF instead of MAPP ratio. The result shows 40% KF (5% MAPP) lead to better tensile performance compared to 40% KF (3% MAPP), 30% KF (5% MAPP) and 30% KF (3% MAPP). Meanwhile, Scanning electron microscopy (SEM) is used to observe the morphological comparison between untreated KF and treated KF as well as PP/KF. The good interfacial bonding between KF and PP was 5% MAPP rather than 3% MAPP due to the optimum strength received. Overall 5% MAPP with 40% PP/KF had shown the best result compared to others with the estimated tensile strength value of 21.38 MPa.

Surface modification of abaca fiber by benzene diazonium chloride treatment and its influence on tensile properties of abaca fiber reinforced polypropylene composites

2014 ◽  
Vol 26 (2) ◽  
pp. 142-149 ◽  
Author(s):  
Ramadevi Punyamurthy ◽  
Dhanalakshmi Sampathkumar ◽  
Raghu Patel Ranganagowda ◽  
Basavaraju Bennehalli ◽  
Pramod Badyankal ◽  
...  
Keyword(s):  
Surface Modification ◽  
Tensile Properties ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Chloride Treatment ◽  
Benzene Diazonium

scholarly journals Effect of a Chemical Treatment Series on the Structure and Mechanical Properties of Abaca Fiber (Musa textilis)

2020 ◽  
Vol 1015 ◽  
pp. 64-69
Author(s):  
Cyron L. Custodio ◽  
Xuan Yang ◽  
Astrid E. Wilsby ◽  
Victor F. Waller ◽  
Ruth R. Aquino ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Load Transfer ◽  
Alkali Treatment ◽  
Tensile Tests ◽  
Water Soluble ◽  
Oh Groups ◽  
Chemical Treatments ◽  
Digital Microscope ◽  
Morphology And Mechanical Properties

This study investigates the relationships between the composition, cell wall microstructure, and mechanical properties of the abaca fiber. Raw abaca fibers have undergone a series of sequential chemical treatments (acetone/methanol, boiling water, EDTA, HCl, NaClO2, and NaOH) to selectively remove certain non-cellulosic components (NCCs) in the fiber, such as waxes, water-soluble fragments, pectin, and lignin in a step-by-step manner. Changes in composition, morphology, and mechanical properties were observed using FTIR spectroscopy and ion chromatography, digital microscope and SEM, and tensile tests, respectively. The raw fiber was composed of 23% NCCs, 18% hemicellulose, and 58% cellulose, and exhibited a 17.4 GPa Young’s modulus and a 444 MPa tensile strength. Furthermore, the raw abaca fibers demonstrated a linear tensile graph without yielding, and a planar fracture surface without fiber pull-outs, thus suggesting a highly elastic but brittle nature. At the end of the alkali treatment, the fibrillated fiber was 83% cellulose, yet the stiffness and strength dropped to 7.3 GPa and 55 MPa, respectively, as more components were removed, and microfibril relaxation and realignment have occurred. Load-bearing cellulose and hemicellulose accounted for 42% and 36% of the stiffness, respectively, due to –OH groups capable of hydrogen bonding. 63% of the strength was due to thenative NCC matrices, which contribute a significant role within the cell wall’s load-transfer activities.

Fabrication of Chemically Treated Natural Fibre Reinforced Polymer Matrix Composites and Measurement of its Sound Absorption Coefficients to Regulate Industrial Noise

2013 ◽  
Vol 465-466 ◽  
pp. 896-900
Author(s):  
Elammaran Jayamani ◽  
Pushparaj Ezhumalai ◽  
Sinin Hamdan ◽  
M. Rezaur Rahman
Keyword(s):  
Rice Straw ◽  
Sound Absorption ◽  
Natural Fiber ◽  
Polymer Matrix Composites ◽  
Fiber Reinforced ◽  
Absorption Coefficients ◽  
Compression Moulding ◽  
Industrial Noise ◽  
Polypropylene Composites ◽  
Chemically Treated

The effects of chemically treated natural fibres (rice straw and kenaf) embedded as filler into polypropylene matrix were investigated for its sound absorption properties to regulate the industrial noise. In this respect, untreated natural fiber as well as treated natural fiber reinforced with polypropylene composites were fabricated and compared. The composites were prepared by compression moulding technique. Its sound absorbing characteristic was investigated with the Impedance tube, according to a transfer function method. A two microphone setup was fabricated according to American society for testing materials ASTM E1050-10 and it is used to measure sound absorption coefficients of composites in the frequency range of 300 Hz to 2000 Hz. The sound absorption coefficients of the composites increased with the frequency. However, at 1000 Hz, the sound absorption coefficient decreased for all treated samples and then increased again which is due to specific character of natural fibers. This point of inflexion was due to the specific characteristic of natural fiber reflecting sound at around 1000 Hz, but absorbing sound in the middle and high frequencies. The results indicates that the process of chemical treatment enhanced the sound absorption coefficients by 12.5% for rice straw reinforced Polypropylene and 15.78% for kenaf fiber reinforced Polypropylene composites respectively.

Thermal Shock Effect of Nano-TiO2 Enhanced Glass Fiber Reinforced Polymeric Composites: An Assessment on Tensile and Thermal Behavior

2020 ◽  
Vol 978 ◽  
pp. 277-283
Author(s):  
Kishore Kumar Mahato ◽  
Krishna Chaitanya Nuli ◽  
Krishna Dutta ◽  
Rajesh Kumar Prusty ◽  
Bankim Chandra Ray
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Glass Fiber ◽  
Thermal Shock ◽  
Viscoelastic Behavior ◽  
Stress Transfer ◽  
Tensile Tests ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Service Period

Fiber reinforced polymeric (FRP) composite materials are currently used in numerous structural and materials related applications. But, during their in-service period these composites were exposed to different changing environmental conditions. Present investigation is planned to explore the effect of thermal shock exposure on the mechanical properties of nanoTiO2 enhanced glass fiber reinforced polymeric (GFRP) composites. The samples were conditioned at +70°C temperature for 36 h followed by further conditioning at – 60°C temperature for the similar interval of time. In order to estimate the thermal shock influence on the mechanical properties, tensile tests of the conditioned samples were carried out at 1 mm/min loading rate. The polymer phase i.e. epoxy was modified with different nanoTiO2 content (i.e. 0.1, 0.3 and 0.5 wt. %). The tensile strength of 0.1 wt.% nanoTiO2 GFRP filled composites exhibited higher ultimate tensile strength (UTS) among all other composites. The possible reason may be attributed to the good dispersion of nanoparticles in polymer matrix corresponds to proper stress transfer during thermal shock conditioning. In order to access the variations in the viscoelastic behavior and glass transition temperature due to the addition of nanoTiO2 in GFRP composite and also due to the thermal shock conditioning, dynamic mechanical thermal analysis (DMTA) measurements were carried out. Different modes of failures and strengthening morphology in the composites were analyzed under scanning electron microscope (SEM).

scholarly journals Effect of Reinforcement of Hydrophobic Grade Banana (Musa ornata) Bark Fiber on the Physicomechanical Properties of Isotactic Polypropylene

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Md. Mamunur Rashid ◽  
Sabrin A. Samad ◽  
M. A. Gafur ◽  
Md. Rakibul Qadir ◽  
A. M. Sarwaruddin Chowdhury
Keyword(s):  
Tensile Strength ◽  
Flexural Strength ◽  
Morphological Characterization ◽  
Morphological Properties ◽  
Hydrophobic Property ◽  
Polypropylene Composites ◽  
Chemical Treatments ◽  
Banana Fibers ◽  
Treated Fiber ◽  
Uptake Studies

This research studied the physicomechanical as well as morphological properties of alkali treated (NaOH and KMnO4) and untreated banana bark fiber (BBF) reinforced polypropylene composites. A detailed structural and morphological characterization was performed using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and mechanical properties testing (tensile strength, flexural strength, and microhardness). Chemical treatments improved the hydrophobic property of the fiber and it is found to be better for KMnO4treatment. Composites with 0, 5, 10, and 15 wt.% loadings were then compared for water uptake studies and revealed that KMnO4treated fiber composites absorb less water compared to others. KMnO4treatment with 15% fiber loading improved the tensile strength, flexural strength, and microhardness of the composites compared to raw and NaOH treated fiber loadings. TGA analysis also shows onset temperature at 400~500°C that is associated with the decomposition of the banana fibers constituents including lignin, cellulose, and hemicelluloses which suggests better thermomechanical stability. All of the values suggest that 15% KMnO4treated banana bark fiber (BBF)/PP composites were found to be better than those of the raw and NaOH treated ones.

A study of the effect of chemical treatments on areca fiber reinforced polypropylene composite properties

2017 ◽  
Vol 24 (4) ◽  
pp. 501-520 ◽  
Author(s):  
Sampathkumar Dhanalakshmi ◽  
Punyamoorthy Ramadevi ◽  
Bennehalli Basavaraju
Keyword(s):  
Research Work ◽  
Weight Ratio ◽  
High Strength ◽  
Maintenance Cost ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Fiber Loading ◽  
Chemical Treatments ◽  
Composite Field ◽  
Chemically Treated

AbstractAreca fibers have a great prospect in the polymer composite field since they possess superior properties like being light weight, strong and having high strength-to-weight ratio. In addition, areca fibers are biodegradable, non-toxic and eco-friendly and have low maintenance cost. In this research work, areca fibers were subjected to chemical treatments such as NaOH, KMnO4, C6H5COCl and H2C=CHCOOH to reduce the hydrophilic nature of areca fibers and to improve interfacial adhesion between areca fibers and thermoplastic polypropylene matrix, so that areca-polypropylene composites with improved properties can be obtained. The untreated and all chemically treated areca-polypropylene composites with 30%, 40%, 50%, 60% and 70% fiber loadings were fabricated by the compression molding technique. Investigations of tensile, flexural and impact properties of areca fiber reinforced polypropylene composites were done under given fiber loadings by following American Standard for Testing Materials (ASTM) standard procedures. Amongst all untreated and chemically treated areca-polypropylene composites, acrylated areca-polypropylene composites with 60% fiber loading showed higher tensile and flexural strength values and with 50% fiber loading showed higher impact strength values. Hence, chemically treated areca-polypropylene composites can be considered as a very promising material for the fabrication of lightweight material industries.

The Effect of Fiber Treatment on the Mechanical Properties of Christmas Palm Fiber-Polyester Composites

2013 ◽  
Vol 467 ◽  
pp. 208-214 ◽  
Author(s):  
S. Kalyanasundaram ◽  
S. Jayabal
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix Composites ◽  
Alkali Treatment ◽  
Fiber Reinforced ◽  
Compression Moulding ◽  
New Variety ◽  
Palm Fiber ◽  
Fiber Treatment ◽  
Polyester Matrix ◽  
Polyester Composites

This paper aims at introducing and investigating the mechanical properties of new variety of natural fibers (Christmas palm fiber) used as reinforcement in polymer matrix composites. It was inferred that the poor inter laminar bonding between the Christmas palm fibers and polyester matrix restricted the mechanical properties of the composites. Hence surface modifications of Christmas palm fibers by means of alkali treatment were done in a view to enhance the bonding nature of the Christmas palm fiber with polyester matrix. The composite fabrication is carried out using compression moulding machine and the mechanical properties were tested as per ASTM standards. The effect of soaking time and solution concentration of Sodium hydroxide on the mechanical properties of Christmas palm fiber reinforced polyester composites were studied and fiber treatment conditions for better mechanical properties are identified. Scanning electron microscopy (SEM) investigations showed that surface modification improved the fiber/ matrix adhesion which in turn enhanced the mechanical properties of the Christmas palm fiber reinforced polyester composite.

Sign in / Sign up

Export Citation Format

Share Document