scholarly journals Durability of alkali and heat-treated kenaf fiber/unsaturated polyester composite fabricated by resin transfer molding under natural weathering exposure

2017 ◽  
Vol 37 (5) ◽  
pp. 1420-1434 ◽  
Author(s):  
Dody Ariawan ◽  
Muhamad S. Salim ◽  
Razaina Mat Taib ◽  
Mohammad Z. Ahmad Thirmizir ◽  
Zainal A. Mohammad Ishak
Keyword(s):  
Unsaturated Polyester ◽  
Resin Transfer Molding ◽  
Natural Weathering ◽  
Kenaf Fiber ◽  
Transfer Molding ◽  
Heat Treated ◽  
Polyester Composite

Effect of Heat Treatment on Properties of Kenaf Fiber Mat/Unsaturated Polyester Composite Produced by Resin Transfer Molding

2014 ◽  
Vol 699 ◽  
pp. 118-123 ◽  
Author(s):  
Dody Ariawan ◽  
Z.A. Mohd Ishak ◽  
R. Mat Taib ◽  
M.Z. Ahmad Thirmizir ◽  
Y.J. Phua
Keyword(s):  
Heat Treatment ◽  
Fiber Strength ◽  
Unsaturated Polyester ◽  
Resin Transfer Molding ◽  
Crystallinity Index ◽  
Cellulose Content ◽  
Molding Process ◽  
Kenaf Fiber ◽  
Transfer Molding ◽  
Ft Ir

This study investigated the effect of heatingtime during heat treatment on mechanical and physical properties of the kenaf fiber and its composites. Kenafbast fibers were modified by heat treatmentat 140°C for2.5, 5, 7.5, 10 and 12.5 hours. Composites were fabricated by resin transfer molding process with unsaturated polyester as matrices and needle-punched kenaf fiber mat as reinforces. The fiberswerecharacterized by Fourier Transform-Infra Red (FT-IR) and X-Ray Diffraction (XRD). FT-IR resultsshowedthe changesin intensity ofhemicelluloce wavelength (1736 cm-1). Besides XRD observation also confirmed the increase of cellulose content in kenafthat described to the increase of crystallinity index ofkenaf fiber with heat treatment. The single fiber strength investigation stated that the highest strength and modulus was obtained bykenaf fiber heated for10hours indrying oven. SEM observation showed the decreasing numbers of impuritieson thefibers surface with fiber treatment compared to untreated kenaf fibers. The flexural properties of composites showed a similar trend to fiber strength, but the fracture toughnesshas showedcontrary results.

scholarly journals Plasma-treated abaca fabric/unsaturated polyester composite fabricated by vacuum-assisted resin transfer molding

2014 ◽  
Vol 1 (3) ◽  
pp. 241-246 ◽  
Author(s):  
Marissa A. Paglicawan ◽  
Byung Sun Kim ◽  
Blessie A. Basilia ◽  
Carlo S. Emolaga ◽  
Delmar D. Marasigan ◽  
...  
Keyword(s):  
Unsaturated Polyester ◽  
Resin Transfer Molding ◽  
Transfer Molding ◽  
Polyester Composite

Wettability and interfacial characterization of alkaline treated kenaf fiber-unsaturated polyester composites fabricated by resin transfer molding

2015 ◽  
Vol 38 (3) ◽  
pp. 507-515 ◽  
Author(s):  
Dody Ariawan ◽  
Z.A. Mohd Ishak ◽  
M.S. Salim ◽  
R. Mat Taib ◽  
M.Z. Ahmad Thirmizir
Keyword(s):  
Unsaturated Polyester ◽  
Resin Transfer Molding ◽  
Kenaf Fiber ◽  
Transfer Molding ◽  
Polyester Composites

Prediction of Long – Term Creep Properties of Kenaf Fiber Unsaturated Polyester Composites

2014 ◽  
Vol 974 ◽  
pp. 9-14
Author(s):  
Saad A. Mutasher ◽  
Ekhlas A. Osman
Keyword(s):  
Curve Fitting ◽  
Linear Time ◽  
Unsaturated Polyester ◽  
Kenaf Fiber ◽  
Creep Properties ◽  
Polyester Composite ◽  
Term Creep ◽  
Long Term Behavior ◽  
Fitting Model

This research focuses on predicting long-term behavior of unsaturated polyester resin (UP) and kenaf unsaturated polyester composite. The objectives of these tests are to establish a relationship between stress, strain and time at constant loading and temperature. The results obtained from these tests are used in predicting the life and strength of the polymer material. Based on the 1,000 hours experimental data, curve fitting and Findley Power Law models are employed to predict long-term behavior of the material. The results showed that curve fitting model accurately predicted the non-linear time dependent creep deformation of these materials with acceptable accuracy.

Property enhancement of kenaf fiber composites by means of vacuum-assisted resin transfer molding (VARTM)

Holzforschung ◽  
2015 ◽  
Vol 69 (3) ◽  
pp. 307-312 ◽  
Author(s):  
Changlei Xia ◽  
Sheldon Q. Shi ◽  
Liping Cai ◽  
Jun Hua
Keyword(s):  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Resin Transfer Molding ◽  
Mercury Porosimetry ◽  
Mechanical Analysis ◽  
Hibiscus Cannabinus ◽  
Transfer Molding ◽  
Interfacial Compatibility ◽  
Kenaf Fibers ◽  
Composite Moduli

Abstract This work was aimed at applying vacuum-assisted resin transfer molding (VARTM) technique to reinforced polymer molding products made of vegetable fibers. Kenaf (Hibiscus cannabinus L. Malvaceae) bast fibers were preformed into mat by means of a cold press. The unsaturated polyester resin was infused into the preforms at a vacuum pressure of 1.3–1.6 kPa. The examination of the mechanical properties and microstructure of the prepared composites indicated that the modulus of elasticity (MOE), modulus of rapture (MOR), and tensile strength (TS) of the VARTM composites were increased by 65.5%, 30.7%, and 41.7%, respectively, compared to the traditional hot-pressing composites. The dynamic mechanical analysis (DMA) revealed that the VARTM composite moduli in the temperature range of -50°C–200°C were doubled. The observations by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and mercury porosimetry confirmed that the interfacial compatibility between the kenaf fibers and the polyester resin was substantially improved.

Kenaf Bast-Unsaturated Polyester Composite: The Effect of Different Alkaline Treatment Condition on Tensile Properties

2013 ◽  
Vol 594-595 ◽  
pp. 644-647
Author(s):  
Abdul Rahman Rozyanty ◽  
M.Y. Nur Firdaus ◽  
Luqman Musa
Keyword(s):  
Unsaturated Polyester ◽  
Alkaline Treatment ◽  
Kenaf Fiber ◽  
Bast Fiber ◽  
The Matrix ◽  
Polyester Composite ◽  
Electron Microscope Analysis ◽  
Kenaf Bast ◽  
Kenaf Bast Fiber ◽  
Composite Properties

The biocomposites were prepared by using kenaf bast fiber mat as reinforcing materials at different percentage. The kenaf bast fiber was treated with alkaline at different sodium hydroxide (NaOH) percentage. Composites which were made from treated alkaline kenaf treated bast fiber showed better mechanical properties (tensile) than those of the unmodified. Scanning electron microscope analysis showed the evidence of the enhancement of the compatibility between kenaf bast fiber and the matrix. The percentage of kenaf fiber in composites also plays a crucial role in determining the composite properties.

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