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.

scholarly journals Millettia pinnata: a study on the extraction of fibers and reinforced composites

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
P. B. Mohankumara ◽  
Shraddha Prashant Thakare ◽  
Vijaykumar Guna ◽  
G. R. Arpitha
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Compositional Analysis ◽  
Morphological Properties ◽  
Reinforced Composites ◽  
Polypropylene Composites ◽  
Wide Range ◽  
Millettia Pinnata

AbstractIn this work, the potential for using Millettia pinnata stalk for extracting cellulosic natural fibers and its subsequent use in reinforced composites was studied. The extracted fibers were characterized for its composition, mechanical, thermal stability and morphological properties. Compositional analysis showed that the fibers possessed 54% cellulose, 12% hemicellulose, 15% lignin and 11% ash. The tensile strength of the fiber was 310 MPa, which is comparable to cotton and linen. The tensile strength of the M. pinnata fiber-reinforced polypropylene composites was 17.96 MPa which was similar to other natural fiber-based composites. M. pinnata fibers appear promising for a wide range of applications including textiles and other typical composites applications.

Improving thermal conductivity of polybutylene terephthalate composites with hybrid synthetic graphite and carbon fiber

2021 ◽  
pp. 089270572110184
Author(s):  
Zafer Yenier ◽  
Sibel Aker ◽  
Yoldas Seki ◽  
Lutfiye Altay ◽  
Ozgur Bigun ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Weight Fraction ◽  
High Heat ◽  
Morphological Properties ◽  
Polybutylene Terephthalate ◽  
Melt Mixing ◽  
Synthetic Graphite

Polybutylene terephthalate (PBT) is a semi-crystalline engineering thermoplastic polyester. PBT offers rapid molding cycles, high heat resistant, crystallinity, fatigue resistance, strength and rigidity, excellent electrical properties, creep resistance, reproducible mold shrinkage and chemical resistance. In this study, PBT was loaded with synthetic graphite and carbon fiber at different weight fractions (10–40 wt.%). PBT-based composites were fabricated by the melt mixing process by using a co-rotating twin screw extruder then thermal, mechanical and morphological properties of filled PBT composites was investigated. Weight fraction of carbon fiber (up to 30 wt.%) increases the tensile strength and flexural strength of PBT, but synthetic graphite loading decreases the tensile strength and flexural strength of PBT. The highest in-plane and through-plane thermal conductivity values were obtained as 9.24 for 40 wt.% synthetic graphite filled composite and 3.41 W/mK for 40 wt.% carbon fiber reinforced composite, respectively. Carbon fiber was found to be more effective in increasing the through-plane thermal conductivities than synthetic graphite.

Thermal and water ageing effect on mechanical, rheological and morphological properties of glass-fibre-reinforced poly(oxymethylene) composite

2018 ◽  
Vol 233 (2) ◽  
pp. 211-224 ◽  
Author(s):  
Emel Kuram
Keyword(s):  
Tensile Strength ◽  
Flexural Strength ◽  
Glass Fibre ◽  
Room Temperature ◽  
Ageing Time ◽  
Melt Flow Index ◽  
Morphological Properties ◽  
Flow Index ◽  
Melt Flow ◽  
Glass Fibre Reinforced

In this study, the ageing behaviour of glass-fibre-reinforced poly(oxymethylene) composite at different conditions was investigated. The ageing was performed in various controlled environments, namely in air at room temperature, in water at room temperature and in an oven at the temperature of 100 ℃. Tensile and flexural tests were conducted to determine the mechanical properties, melt flow index was measured to determine the rheological property and scanning electron microscopy was used to observe the morphological property of unaged and aged poly(oxymethylene) samples. A reduction in both tensile and flexural strength was observed with all ageing environment. The worst strength retention was obtained with water ageing. Water absorbed by glass-fibre-reinforced poly(oxymethylene) composite had a detrimental influence on the tensile and flexural strength. Tensile strength was affected by the ageing environments. The decrease in the tensile strength of air and thermally aged poly(oxymethylene) was slower than that of water aged poly(oxymethylene), and the tensile strength of aged samples decreased as the ageing time increased. The combined actions of heat, air and water (thermal + water + air ageing) did not further degrade glass-fibre-reinforced poly(oxymethylene) compared to only water ageing at the room temperature. All tensile stress–strain and flexural load–deflection curves showed the similar tendency and did not change with ageing environments and time. All aged samples showed higher melt flow index values than that of unaged sample and the changes in melt flow index could be an indicator of degradation.

Effect of Reprocessing Palm Fiber Composite on the Mechanical Properties

2014 ◽  
Vol 699 ◽  
pp. 146-150 ◽  
Author(s):  
Sivakumar Dhar Malingam ◽  
Muhammad Hilmi Ruzaini bin Hashim ◽  
Md Radzai bin Said ◽  
Ahmad Rivai ◽  
Mohd Ahadlin bin Daud ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Waste Disposal ◽  
Oil Palm ◽  
Fiber Composite ◽  
Young Modulus ◽  
Palm Fiber ◽  
Polypropylene Composites ◽  
Useful Life

Concern for the environment, both in terms of limiting the use of finite resources and the need to manage waste disposal, has led to increasing pressure to recycle materials at the end of their useful life. This work describes the effects of reprocessing on the mechanical properties of oil palm fiber reinforced polypropylene composites (PFC). Composites, containing 30wt% fiber with 3wt% Maleate Polypropylene as a coupling agent, were reprocessed up to six times. For this composite, tensile strength (TS) and Young modulus (YM) were found to decrease by 9.6% and 4.7% after being reprocessed for six times. Flexural strength was found to decrease by 23.8% with increased number of reprocessing. The hardness numbers of the composite were found to increase by 7.43% from 72.10 to 77.89 after the sixth reprocessing. In general the degradation on the mechanical properties is considered to be small and PFC has potential to be reprocessed.

scholarly journals Influence of Chemical Treatment on Tensile and Flexural Properties of Sansevieria Cylindrica Polyester Composites

2019 ◽  
Vol 9 (2S2) ◽  
pp. 547-550
Keyword(s):  
Tensile Strength ◽  
Flexural Strength ◽  
Fibre Length ◽  
Natural Fibre ◽  
Curing Temperature ◽  
Weight Percentage ◽  
Chemical Treatments ◽  
Polyester Composite ◽  
Polyester Matrix ◽  
Performance Surface

The sansevieria cylindrica polyester composite slabs are made by compression molding technique using fibres treated with sodium hydroxide (NaOH), silane, calcium hydroxide (Ca(OH)2) and potassium permanganate (KMnO4) for optimum fibre length, optimum weight percentage and optimum curing temperature ( 40 mm, 40% wt, 600C) and their tensile properties have been studied. The inclusion of sansevieria cylindrica fibre as reinforcement into polyester matrix improves the flexural and tensile strength till a certain weight percentage, then it decreases drastically by further addition of fibre. The main problem in natural fibre is water uptake which damages the fibre and thereby the strength is reduced. To improve the performance, surface modification of fibres with various chemical treatments is performed and it enhanced the properties to a greater extent. Ca(OH)2 treated composites showed higher tensile strength whereas silane treated composites showed lower tensile strength. KMnO4 treated composites showed higher flexural strength whereas silane treated composites showed lower flexural strength.

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. 

scholarly journals Influence of Surface Modification on Physical, Mechanical, and Morphological Properties of Natural Single Areca catechu Fiber

2019 ◽  
Vol 35 (2) ◽  
pp. 605-610
Author(s):  
Raghu Patel G. Ranganagowda ◽  
Sakshi Shantharam Kamath ◽  
Ravi Kumar Chandrappa ◽  
Basavaraju Bennehalli
Keyword(s):  
Tensile Strength ◽  
Alkali Treatment ◽  
Fiber Surface ◽  
Morphological Properties ◽  
Alternative Source ◽  
Elongation At Break ◽  
Areca Catechu ◽  
Potential Alternative ◽  
Treated Fiber ◽  
Surface Modified

In the present study, fibers extracted from empty areca fruit were surface modified by giving chemical treatment with 2% NaOH solutionat laboratory temperature to investigate the effect of alkali treatment onphysical, mechanical, and morphological properties of arecafiber. Tensile strength and Young’s modulus of areca fiber found to decrease with alkali treatment. But improvement in elongation at break of the fiber was observed for alkali treated fiber due to elimination of lignin and hemicelluloses from the fiber surface upon alkali treatment. The results proved that the natural areca fiber is a potential alternative source for strengthening the polymer composite industries.

Water Absorption and Tensile Strength of Coconut Filter Fibers/Polypropylene Composites

2013 ◽  
Vol 702 ◽  
pp. 207-212 ◽  
Author(s):  
N.P.G. Suardana ◽  
I. Putu Lokantara ◽  
Y.J. Piao ◽  
J.K. Lim
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
Water Absorption ◽  
Immersion Time ◽  
Room Temperature ◽  
Fiber Composite ◽  
Fiber Composites ◽  
Polypropylene Composites ◽  
Untreated Fiber ◽  
Treated Fiber

In this study, we evaluated water absorption and tensile properties of coconut filter fiber reinforced polypropylene composites. The fibers were subjected to various immersion times for 0.5, 1, and 3 h in 0.5 % acrylic acid solution at room temperature and 0.5 h at 70 oC. The treated fibers were used as reinforcement of polypropylene composites. Water absorption of treated fiber composites was lower than those of untreated fiber composite. Boiling in water significantly affect water absorption rate of the composites. The tensile strength and elastic modulus of treated fiber are higher than untreated fiber. They show a decrease in tendency when the immersion time increased. Tensile strength and elastic modulus of composites with AA-treated at 70 oC fiber are the highest.

scholarly journals Improvement in Mechanical Properties of Cantala Fiber and Short Cantala/Recycled High-Density Polyethylene Composite through Chemical Treatment

2017 ◽  
Author(s):  
Wijang Wisnu Raharjo ◽  
Rudy Soenoko ◽  
Yudy Surya Irawan ◽  
Agus Suprapto
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Alkali Treatment ◽  
Amorphous Material ◽  
Tensile Modulus ◽  
Fiber Surface ◽  
Degree Of Crystallinity ◽  
Polyethylene Composite ◽  
Treated Fiber

The improvement of mechanical properties of cantala fiber and its composites. Treatments including alkali, silane, and the combination of both were carried out to modify the fiber surface. The influence of chemical treatments on fiber properties such as the degree of crystallinity and tensile strength was investigated. A variety of short cantala fiber reinforced rHDPE composites were produced by hot press, and the effect of fiber treatment on the flexural strength of composites was observed. SEM observations also carried out to highlight these changes. The result shows that alkali treatment improves tensile strength and tensile modulus of alkali treated fiber (NF12) which was predicted as a result of the enhancement of the cellulose crystallinity. In contrast, the tensile strength and tensile modulus of silane (SF05) and alkali-silane treated fiber (NSF05) decreased compared to untreated fiber (UF) which is caused by the addition of amorphous material. The tensile strength of alkali-silane treated fiber (NSF05) was lower than alkali treated fiber (NF12), but the composites prepared with NSF05 showed the highest increment of flexural strength of 25.9%. This may be due the combination of alkali and silane treatment helped in the better formation of fiber-matrix interface adhesion.

Mechanical Property Improvement of Poly(Butylene Succinate) by Reinforcing with Modified Fumed Silica

2014 ◽  
Vol 1025-1026 ◽  
pp. 215-220 ◽  
Author(s):  
Sasirada Weerasunthorn ◽  
Pranut Potiyaraj
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Flexural Strength ◽  
Fumed Silica ◽  
Tensile Modulus ◽  
Silica Particles ◽  
Melt Mixing ◽  
Butylene Succinate ◽  
Ir Spectrophotometry

Fumed silica particles (SiO2) were directly added into poly (butylene succinate) (PBS) by melt mixing process. The effects of amount of fumed silica particles on mechanical properties of PBS/fumed silica composites, those are tensile strength, tensile modulus, impact strength as well as flexural strength, were investigated. It was found that the mechanical properties decreased with increasing fumed silica loading (0-3 wt%). In order to increase polymer-filler interaction, fumed silica was treated with 3-glycidyloxypropyl trimethoxysilane (GPMS), and its structure was analyzed by FT-IR spectrophotometry. The PBS/modified was found to possess better tensile strength, tensile modulus, impact strength and flexural strength that those of PBS/fumed silica composites.

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