Natural Fiber Reinforced Unsaturated Polyester Composites - An Approach On Compression Molding

2001 ◽  
Author(s):  
Nestor Pedro Giacomini ◽  
Jürgen Knothe ◽  
Octavio Pimenta Reis Neto ◽  
Alcides Lopes Leao
Keyword(s):  
Natural Fiber ◽  
Unsaturated Polyester ◽  
Compression Molding ◽  
Fiber Reinforced ◽  
Polyester Composites

Hemp Fiber Reinforced Unsaturated Polyester Composites

2006 ◽  
Vol 11-12 ◽  
pp. 521-524 ◽  
Author(s):  
Yuan Jian Tong ◽  
Liang Hua Xu
Keyword(s):  
Heat Treatment ◽  
Natural Fiber ◽  
Unsaturated Polyester ◽  
Compression Molding ◽  
Molding Pressure ◽  
Fiber Reinforced ◽  
Hemp Fiber ◽  
Fiber Fraction ◽  
Glass Fiber Reinforced ◽  
Loss Of Weight

Non-woven hemp fiber mat has been used to reinforce unsaturated polyester to make natural fiber composites. Thermal properties of the hemp fiber mat were investigated to discover the range of heat treatment temperatures suitable for the hemp fiber mat. Loss of weight during heat treatment and absorption of moisture from the environment during storage of the hemp fiber mat were also studied. Both hand lay-up technique and compression molding were used to make hemp mat composites. Due to the low fiber fraction, no significant reinforcing effect was found in the composite made by the hand lay-up technique. The effects of heat treatment of fibers, water content in the fibers, fiber fraction, and manufacture methods on tensile properties of the resulted composites were investigated. Hemp mat composites with tensile strength and modulus comparable to those of [±45°]4 glass fiber reinforced polyester were achieved by compression molding at a molding pressure of 2MPa.

scholarly journals The Effect of Alkali Treatment And Microcrystalline Cellulose Addition on Density Value of Cantala Fiber Reinforced Unsaturated Polyester Composites

2021 ◽  
Vol 20 (1) ◽  
pp. 1
Author(s):  
Muhammad Ghozali ◽  
Dody Ariawan ◽  
Eko Surojo
Keyword(s):  
Microcrystalline Cellulose ◽  
Natural Fiber ◽  
Volume Fraction ◽  
Treatment Time ◽  
Alkali Treatment ◽  
Unsaturated Polyester ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Molding Method ◽  
Polyester Composites

<p>Natural fiber reinforced composites is one materials potentially developing in Indonesia. One of biggest problem with composites specimen is its void. One properties to find out void of composites is composites density value. The objective of research is to investigate the effect of fiber alkali (NaOH) treatment and microcrystalline cellulose (MCC) addition on density value of cantala fiber reinforced unsaturated polyester composites. Firstly, cantala fibers was submerged into alkali (NaOH) 6% solution for 0, 3, 6, 9, and 12 hours. Furthermore, the fiber was washed using acetid acid and then using clean water to reach pH 7. Thereafter, cantala fiber was dried in the oven for 10 hours at temperature 60<sup>0</sup>C. Composites was composed of cantala fiber, unsaturated polyester polymer matrix, and microcrystalline cellulose according to the composition with volume fraction 30%. Composites was casted using compression molding method with compressive strength of 10 MPa for 12 hours. All specimens of composites undertake post cure for 2 hours at 60<sup>0</sup>C. Density test was conducted using densimeter by calculating the density of composites in the air and the water. The result of research showed that the longer the alkali treatment time and the more addition of microcrystalline cellulose (MCC) filler, the higher is the composites density. The higher density value of cantala fiber reinforced unsaturated polyester is alkali treatment 6 hours, which was 1.223 gr/cm<sup>3</sup>.</p>

Fabrication and Characterization of Banana Fiber Reinforced Unsaturated Polyester Resin Based Composites

2020 ◽  
Vol 29 ◽  
pp. 84-92
Author(s):  
Md. Sahadat Hossain ◽  
Mashrafi Bin Mobarak ◽  
Farzana Khan Rony ◽  
Sazia Sultana ◽  
Monika Mahmud ◽  
...  
Keyword(s):  
Polyester Resin ◽  
Natural Fiber ◽  
Unsaturated Polyester ◽  
Testing Machine ◽  
Unsaturated Polyester Resin ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Banana Fiber ◽  
Bending Modulus ◽  
Ft Ir

Concerning the importance of composite material for multi-purpose applications, an attempt has been taken to synthesize composites using natural fiber with unsaturated polyester resin. Since the use of synthetic polymer plays a key role in polluting the environment, we have used natural fiber (banana fiber) as an alternative source. Our approach dealt with the preparation of reinforced composites by hand lay-up technique using 20 % banana fiber (by weight) as reinforcing materials. Several techniques were applied to characterize synthesized composites e.g. universal testing machine (UTM), Fourier transform infrared (FT-IR) spectroscopy, and scanning electron microscopy (SEM). UTM facilitated the measurement of the tensile strength (TS), tensile modulus (TM), elongation at break (EB), bending strength (BS), and bending modulus (BM) while functional groups were confirmed by FT-IR and the morphology of the composites was investigated by SEM. Observed results revealed that the TS, TM, BS, and BM followed an increasing fashion of 100%, 53%, 75%, and 55% respectively with respect to the matrix materials. On the other hand, the EB of the composite reduced drastically by 50%. Hence, higher mechanical properties were obtained for the banana fiber reinforced composites (BFRC) than the unsaturated polyester resin (UPR) matrix.

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