The Influence of Ultrasonic Energy on Chemical Treatment of Surface Properties and the Properties of Composites Made of Luffa Cylindrical Fiber-Polyester Resin

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
E. Dilara Koçak
Keyword(s):  
Composite Structure ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Natural Fibers ◽  
Morphological Characteristics ◽  
Mechanical Tests ◽  
Cylindrical Fiber ◽  
The Matrix ◽  
Mechanical Performances ◽  
Properties Of Composites

Producing composites from natural fibers is known to be common. These fibers benefit from their mechanical performances, low density, and their biodegradability. However, it is necessary for the fibers to form adhesion in the matrix. Therefore, it is necessary to apply a chemical process to the surface of the fibers. In this study, four different processes in conventional and ultrasonic energies were applied on luffa cylindrical fibers. At the end of the application, a composite structure was formed on the fibers that were obtained by using unsaturated polyester resin. The changes in the characteristics of the composite structure were recorded by mechanical tests, Fourier transform infrared, X-ray diffractometer, and their morphological characteristics by means of scanning electron microscopy. Considering all the results, formic acid and acetic acid process results were found to adequately modify the fiber surfaces.

scholarly journals JUTE AND COTTON COMPOSITES REINFORCED UNSATURATED POLYESTER

2021 ◽  
Vol 25 (5) ◽  
pp. 39-48
Author(s):  
Sarraa A. Mansor ◽  
◽  
Amer H. Majeed ◽  
Keyword(s):  
Moisture Absorption ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Natural Fibers ◽  
Weight Fraction ◽  
Mechanical Tests ◽  
Cotton Fibers ◽  
Impact Compression ◽  
Jute Fibers ◽  
Different Types

In this study, the effect of adding two different types of reinforcing natural fibers (jute and cotton) singly and in combination as a hybrid to unsaturated polyester resin was investigated. At the first discontinuous random fibers used in (5)mm length are added separately with different weight fraction as (3, 4.5, 6, and 7.5 wt.%) for both types fibers, then these fibers were mixed at (3.75 wt.% jute, 3.75 wt.% cotton) in (5)mm long. and The mechanical tests (hardness, Impact, and compression), as well as moisture absorption, are performed. The results show an increase in these properties with increasing weight fraction of fibers (jute & cotton) and reach the maximum amount at the addition of weight fraction of (7.5 wt.%) of both fibers (jute and cotton) separately. All composite specimens reinforced with jute fibers showed the highest hardness, Impact, compression, and moisture absorption among the composite specimen reinforced by cotton fibers and higher than in combination as a hybrid it was (93.1, 28.81 KJ/m2, 205 Mpa., and 1.4%) respectively.

Analisa Kekuatan Bahan Komposit Yang Diperkuat Serat Bambu Menggunakan Resin Polyester Dengan Memvariasikan Susunan Serat Secara Acak Dan Lurus Memanjang

2020 ◽  
Vol 2 (1) ◽  
pp. 28-35
Author(s):  
Rokki Manurung ◽  
Sutan Simanjuntak ◽  
Jesayas Sembiring ◽  
Richard A.M. Napitupulu ◽  
Suriady Sihombing
Keyword(s):  
Polymer Composites ◽  
Polyester Resin ◽  
Natural Fibers ◽  
Resin Matrix ◽  
Strength Increase ◽  
Test Results ◽  
The Matrix ◽  
Bamboo Fibers ◽  
Reinforcing Material

Composites are materials which are mixed with one or more different and heterogeneous reinforcement. Matrix materials can generally be polymers, ceramics and metals. The matrix in the composite serves to distribute the load into all reinforcing material. Matrix properties are usually ductile. The reinforcing material in the composite has the role of holding the load received by the composite material. The nature of the reinforcing material is usually rigid and tough. Strengthening materials commonly used so far are carbon fiber, glass fiber, ceramics. The use of natural fibers as a type of fiber that has advantages began to be applied as a reinforcing material in polymer composites. This study seeks to see the effect of the use of bamboo natural fibers in polyester resin matrix on the strength of polymer composites with random and straight lengthwise fiber variations. From the tensile test results it can be seen that bamboo fibers can increase the strength of polymer composites made from polyester resin and the position of the longitudinal fibers gives a significantly more strength increase than random fibers.

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 Characterization of Ceramic Waste Filled Unsaturated Polyester Resin

2020 ◽  
Vol 57 (3) ◽  
pp. 52-60
Author(s):  
Mohamed Farsane ◽  
Abdellah Anouar ◽  
Souad Chah ◽  
Miloud Bouzziri
Keyword(s):  
Water Absorption ◽  
Polyester Resin ◽  
Filler Content ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Ceramic Waste ◽  
The Matrix ◽  
Polyester Matrix ◽  
Resin Formulation

In this study, the composites of ceramic waste filler polyester were produced with ceramic waste as the filler and unsaturated polyester resin as the matrix. Various weight of filler loads (particle size [180 �m) were used; 0, 28.5, 41 and 50 wt% in view to better understand the effect of filler content on the mechanical, thermal properties and water absorption of the composites. Additionally, Fourier transform infrared spectroscopy was used to characterize the samples, from the findings, it is noticed an increase in the level of porcelain powder decreased the flexural strength and Hardness and increased the density. The results of water absorption have shown the composites absorbs fewer water. Thermal degradation indicates that the composite is more resistant to temperature than unsaturated polyester matrix due to the effect of porcelain powder incorporated. Moreover, the results reveal an opportunity for using the ceramic waste as filler in unsaturated polyester resin formulation.

Tensile and Flexural Properties of Untreated Sisal Fibers Reinforced Unsaturated Polyester Resin Composites

2020 ◽  
Vol 30 ◽  
pp. 73-78
Author(s):  
Shyrlainne Crespo Carvalho de Souza ◽  
Isabella Cristina Boroto Vieira ◽  
Izabela Flois Barbosa ◽  
Natalício Filipe Teixeira Garcia Leão ◽  
Antonio Carlos Barbosa Zancanella ◽  
...  
Keyword(s):  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Flexural Modulus ◽  
Natural Fibers ◽  
Unsaturated Polyester Resin ◽  
Resin Composites ◽  
Curing Process ◽  
Manufacturing Costs ◽  
Flexural Tests ◽  
Sisal Fibers

Biobased products have been widely used to prevent damage to the environment. In this context, the use of composites reinforced with natural fibers, replacing synthetics ones, has motivated several researches in last years. The objective of the present work was to characterize composites prepared with unsaturated polyester resin and untreated sisal fibers by tensile and flexural tests. The untreated sisal fibers reinforcement was investigated using 25 g and 50 g masses. The fibers were randomly arranged into the resin to mold composite boards, using the compression molding technique without heating, in a curing process at 25°C for 48 hours. The results indicated that composite with 50 g presented better tensile strength (49%), flexural strength (71%) and flexural modulus (137%). The increase of fibers content improved the mechanical behavior of the composite. In addition, the use of natural fibers replacing a portion of petroleum-based resin can increase the sustainable concept of the products and reduce manufacturing costs, because it can be used less resin.

Preparation, Morphology and Thermal Properties of Rubber-Modified Polyester Resins

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
M O Munyati ◽  
P A Lovell
Keyword(s):  
Thermal Properties ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Matrix Material ◽  
Good Control ◽  
Resin Matrix ◽  
Scanning Calorimetry ◽  
Polyester Resins ◽  
The Matrix ◽  
Size And Morphology

AbstractThe preparation of polyester resin blends consisting of an unsaturated polyester resin matrix and rubbery particles comprising three radially-alternating glassy and rubbery layers is described. The morphology of the resin blends was examined by transmission electron microscopy (TEM) while thermal properties were investigated by differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). The results show that the particles were prepared with good control of particle size and morphology. DMTA results showed no reduction in the Tg of the matrix whilst the shear modulus of modified materials was found to be lower than that of the matrix material.

Sustainable Cellular Biocomposites from Natural Fibers and Unsaturated Polyester Resin for Housing Panel Applications

2005 ◽  
Vol 13 (2) ◽  
pp. 139-149 ◽  
Author(s):  
Rigoberto Burgueño ◽  
Mario J. Quagliata ◽  
Geeta Misra Mehta ◽  
Amar K. Mohanty ◽  
Manjusri Misra ◽  
...  
Keyword(s):  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Natural Fibers ◽  
Unsaturated Polyester Resin

scholarly journals A Comparative Study of Dispersion Techniques for Nanocomposite Made with Nanoclays and an Unsaturated Polyester Resin

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
Farida Bensadoun ◽  
Nadir Kchit ◽  
Catherine Billotte ◽  
François Trochu ◽  
Edu Ruiz
Keyword(s):  
Rheological Behavior ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Liquid Composite Molding ◽  
Scanning Calorimetry ◽  
Polymer Resin ◽  
The Matrix ◽  
Shear Mixing ◽  
Mixing Method

Over the last few years, polymer/clay nanocomposites have been an area of intensive research due to their capacity to improve the properties of the polymer resin. These nanocharged polymers exhibit a complex rheological behavior due to their dispersed structure in the matrix. Thus, to gain fundamental understanding of nanocomposite dispersion, characterization of their internal structure and their rheological behavior is crucial. Such understanding is also key to determine the manufacturing conditions to produce these nanomaterials by liquid composite molding (LCM) process. This paper investigates the mix of nanoclays particles in an unsaturated polyester resin using three different dispersion techniques: manual mixing, sonication, and high shear mixing (HSM). This paper shows that the mixing method has a significant effect on the sample morphology. Rheology, scanning electron microscopy (SEM), and differential scanning calorimetry (DSC) characterization techniques were used to analyze the blends morphology and evaluate the nanoclays stacks/polymer matrix interaction. Several phenomena, such as shear thinning and premature polymer gelification, were notably observed.

scholarly journals Role of Chemically Functionalization of Bamboo Fibers on Polyethylene-Based Composite Performance: A Solution for Recycling

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2564
Author(s):  
Meisam Kouhi ◽  
Simona Butan ◽  
Yang Li ◽  
Elias Shakour ◽  
Mihaela Banu
Keyword(s):  
Natural Fibers ◽  
High Volume ◽  
Mechanical Tests ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Plastic Bags ◽  
Depth Analysis ◽  
The Matrix ◽  
Bamboo Fibers ◽  
Recycled Low Density Polyethylene

Low-density polyethylene is the most common polymer for manufacturing containers, bottles, tubes, plastic bags, computer components and so on. There is an urgent need to find solutions for its recycling and reintegration in high volume production components such as non-structural auto applications. The reinforcement of recycled low-density polyethylene with natural fibers represents a solution for the re-use of the recycled low-density polyethylene. However, there is a lack of understanding of how the natural fibers influence the behavior of the bare low-density polyethylene, and furthermore, how the interface between the fibers and the matrix can be controlled in composite to obtain the designed toughness, strength, stiffness and damping. In this sense, the study presents an in-depth analysis of the behavior of three coupling agents used in the chemically functionalized bamboo fibers interface for reinforcing low-density polyethylene composites. Through mechanical tests, the mechanical properties are determined and compared and finally, a correlation between the viscous behavior of the resulted composites and the toughening mechanism is proposed. The conclusion of the study enables a flexible design of polymer composite components fabricated of recycled and non-recycled low-density polyethylene and natural fibers.

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