Immersion Temperature Effects on the Water Absorption Behavior of Hybrid Lignocellulosic Fiber Reinforced-Polyester Matrix Composites

2007 ◽  
Vol 46 (5) ◽  
pp. 515-520 ◽  
Author(s):  
O. L. S. Alsina ◽  
L. H. de Carvalho ◽  
F. G. Ramos Filho ◽  
J. R. M. d'Almeida
Keyword(s):  
Water Absorption ◽  
Temperature Effects ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Lignocellulosic Fiber ◽  
Polyester Matrix

scholarly journals The Effect of Moisture on the Properties of Glass Fiber Polymer Matrix Composites with MoS2 and CaCO3

2019 ◽  
Vol 8 (6) ◽  
pp. 4800-4806
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Glass Fiber ◽  
Epoxy Matrix ◽  
Polymer Matrix Composites ◽  
Tap Water ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
The Matrix

The mechanical properties and water absorption behavior of a pure glass fiber reinforced epoxy matrix and a glass fiber reinforced epoxy filled composites immersed into a tap water were investigated. The main purpose of this experiment is addition of two different powdered fillers (CaCO3 and MoS2 ) into the epoxy matrix and comparing the properties of pure GFRP and filled GFRP. The composites specimens with fillers absorb less water when compared to pure GFRP specimens at room temperature. Water absorption curves and equilibrium moisture content were determined. The composites exhibit a positive deviation from the Fickan’s law with the addition of fillers into the matrix. The influence of water uptake has significant effect on the reduction of mechanical properties. It is observed that 3% filled MoS2 in epoxy matrix has less uptake of water and the tensile strength decreased is 3% , flexural strength decreased up to 18% and shear strength is 42% decreased when compared to CaCO3 filled composites and unfilled glass fiber reinforced polymer composite.

Dynamic-Mechanical Performance of Sponge Gourd Fiber Reinforced Polyester Composites

2016 ◽  
Vol 869 ◽  
pp. 203-208 ◽  
Author(s):  
Verônica Scarpini Cândido ◽  
Michel Picanço Oliveira ◽  
Sergio Neves Monteiro
Keyword(s):  
Glass Transition ◽  
Mechanical Performance ◽  
Matrix Composites ◽  
Natural Materials ◽  
Dynamic Mechanical ◽  
Lignocellulosic Fibers ◽  
Lignocellulosic Fiber ◽  
Sponge Gourd ◽  
Polyester Matrix ◽  
Polyester Composites

The engineering applications of natural materials to replace synthetic ones has marked increased in past decades owing to environmental, societal and economical issues. Among these natural materials, the lignocellulosic fibers obtained from plants are successfully being used as polymer composites reinforcement is substitution of the traditional glass fiber. One relatively unknown lignocellulosic fiber with potential for composite reinforcement is that extracted from the sponge gourd. In the present work, the dynamic-mechanical performance of unsaturated orthophtalic polyester matrix composites was evaluated for different volume fractions of continuous and aligned sponge gourd fiber reinforcement. The results revealed that an increasing incorporation of sponge gourd fiber improved the composite viscoelastic stiffness, while decreasing its glass transition temperature.

Tensile Test of High Strength Thinner Curaua Fiber Reinforced Polyester Matrix Composite

2016 ◽  
Vol 869 ◽  
pp. 361-365 ◽  
Author(s):  
Sergio Neves Monteiro ◽  
Frederico Muylaert Margem ◽  
Noan Tonini Simonassi ◽  
Rômulo Leite Loiola ◽  
Michel Picanço Oliveira
Keyword(s):  
Tensile Strength ◽  
Natural Fibers ◽  
High Strength ◽  
Tensile Tests ◽  
Fiber Composites ◽  
Matrix Composites ◽  
Lignocellulosic Fibers ◽  
Lignocellulosic Fiber ◽  
Polyester Matrix ◽  
Curaua Fibers

In recent years natural fibers, especially those lignocellulosic extracted from plants, have gained attention owing to their engineering performance as polymer composite reinforcement. It was found that some of these lignocellulosic fibers, such as the curaua, ramie and sisal may reach tensile strength above 1000 MPa in association with very thin diameters. Therefore. the objective of the present work was to fabricate polyester matrix composites with the highest tensile strength possible, by reinforcing with the thinnest continuous and aligned curaua fibers. Tensile tests results of composites reinforced with 30% volume of these thinnest curaua fibers showed a tensile strength of 135 MPa, which corresponds to one of the highest strength attained for lignocellulosic fiber composites.

Investigation of Nanomechanical Properties of the Interphase in a Glass Fiber Reinforced Polyester Composite Using Nanoindentation

2003 ◽  
Vol 125 (2) ◽  
pp. 90-96 ◽  
Author(s):  
Sanjeev K. Khanna ◽  
P. Ranganathan ◽  
S. B. Yedla ◽  
R. M. Winter ◽  
K. Paruchuri
Keyword(s):  
Elastic Modulus ◽  
Glass Fiber ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Atomic Force ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Polymer Composites ◽  
Polyester Composite ◽  
Polyester Matrix

Glass fiber reinforced polymer composites are widely used as structural materials. These two-component materials can be tailored to suit a large variety of applications. A better understanding of the properties of the fiber-matrix “interphase” can facilitate optimum design of the composite structure. The interphase is a microscopic region around the fiber and hence nano-scale investigation using nano-indentation techniques is appropriate to determine mechanical property variations within this region. In this study the atomic force microscope adapted with a commercial nanoindenter has been used to determine the variation of the elastic modulus across the interphase for different silane coated glass fiber reinforced polyester matrix composites. A comparative study of the elastic modulus variation in the various interphases is reported. The results are discussed in the light of the current limitations of the instrumentation and analysis.

Jute Fiber Reinforced Polymeric Composites With Flexible Interphase

2012 ◽  
Author(s):  
Tetsushi Koshino ◽  
Mohamed S. Aly-Hassan ◽  
Hiroyuki Hamada
Keyword(s):  
Unsaturated Polyester ◽  
Weight Ratio ◽  
Matrix Cracking ◽  
Jute Fiber ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Jute Fibers ◽  
Jute Cloth ◽  
Polyester Matrix ◽  
The Impact

In this research, the flexible interphase concept was introduced to enhance the poor mechanical properties of jute fiber reinforced unsaturated polyester matrix composites. The jute cloth reinforcement was obtained from recycled coffee bags. These jute cloths after washing by water and drying were soaked in mixture of Polybutadiene Epoxydied as flexible resin and acetone for 10 seconds. Several mixtures consist of 0, 2, 3.5, 5 and 8 wt% of Polybutadiene Epoxydied and 100, 98, 96.5, 95 and 92 wt% of acetone, respectively, to form flexible interface around the jute fibers. Jute cloth reinforced unsaturated polyester matrix composites with different flexible interphase incremental weight ((Wa-Wb)/Wb) ratios were fabricated by hand lay-up method and examined by a series of mechanical tests. The mechanical testing including tensile, bending, Izod strength impact and drop impact was carried out for these composites to evaluate the effect of the flexible interphase and acetone on the jute cloth composites. The flexible interphase succeed to control the mechanical properties of jute fiber reinforced unsaturated polyester matrix composites. Inserting flexible interphase between unsaturated polyester matrix and jute fibers leads to smooth fluctuation, less matrix cracking, in the second part after the knee point of each stress-strain curve as exhibited in composites with higher flexible interphase incremental weight ratio. This means not only the brittle matrix but also interface/interphase dominates the multiple matrix cracking behavior in jute cloth reinforced unsaturated polyester matrix composites. Inserting flexible interphase between unsaturated polyester matrix and jute fibers leads to less number of multiple cracking as shown in the second portion of flexural stress-displacement curve. This means the number of multiple cracking are dominated by flexible interphase. The impact strength of jute cloth reinforced unsaturated polyester matrix composites with flexible interphase incremental weight ratio of 1.2% is higher than that of jute cloth reinforced unsaturated polyester matrix composites without flexible interphase by about 45%. The impact energy after maximum load has increased significantly with all flexible interphase incremental weight ratios.

Water Absorption in Sisal Fiber Reinforced-Polymeric Matrix Composites: Three-Dimensional Simulations and Experiments

2018 ◽  
Vol 20 ◽  
pp. 143-154
Author(s):  
D. Gomes dos Santos ◽  
A.G. Barbosa de Lima ◽  
P. de Sousa Costa ◽  
E. Santana de Lima ◽  
G. Moreira ◽  
...  
Keyword(s):  
Water Absorption ◽  
Polymer Composite ◽  
Three Dimensional ◽  
High Water ◽  
Water Bath ◽  
Sisal Fiber ◽  
Matrix Composites ◽  
Polyester Matrix ◽  
Sisal Fibers ◽  
Polymeric Matrix Composites

In this work was conducted a theoretical and experimental study of water absorption in polyester matrix composites reinforced with sisal fiber at temperatures of 25, 50 and 70°C. A fiber content 44.6% sisal fibers, and 55.4% polyester matrix were used in the manufacture of the polymer composite. The dimensions of the composite were 20x20x3mm3and 20x20x6mm3. Water absorption tests were conducted by immersion of the samples in a distilled water bath and the water uptake calculated by weight difference of the samples in the dry and wetted condition at different elapsed time. A three-dimensional mathematical model was developed to predict mass transfer during the water absorption inside the parallelepiped solid. Results of water absorption kinetic and moisture content distribution inside the composites showed the more favorable areas which presents delamination problems due the weakness of the fiber-matrix interface and consequently, reduction in the mechanical properties. It was found that the high water bath temperatures accelerate the absorption process and that the water absorption of the sisal reinforced polymer composite with 3 mm of thickness was faster than the with 6 mm of thickness.

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