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.

MECHANICAL PROPERTIES OF SISAL/GLASS FIBER REINFORCED HYBRID COMPOSITES: A REVIEW

2018 ◽  
Vol 6 (2) ◽  
pp. 70-76
Author(s):  
Govind Pathak ◽  
Om Prakash Dubey ◽  
Prafful Kumar Manoharan
Keyword(s):  
Glass Fiber ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Industrial Applications ◽  
Fiber Reinforced ◽  
Synthetic Fibers ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Fundamental Research

The natural fiber-reinforced polymer composite is swiftly growing both in phrases of their industrial applications and fundamental research. They are renewable, cheap, absolutely or in part recyclable and biodegradable. The incorporation of herbal fibers consisting of sisal with glass fiber hybrid composites has additionally received growing industrial packages. Herbal and synthetic fibers are mixed in the same matrix (unsaturated polyester) to make sisal/glass fiber hybrid composites and the mechanical residences of those hybrid composites had been studied. A giant development in mechanical homes of sisal/glass fiber hybrid composites has been observed. the chalk powder (additive) is likewise introduced to the resin (unsaturated polyester) in proportions of 1%, 2%, 3% by way of weight of resin respectively and sisal/glass fiber hybrid composites were organized through the usage of this resin to take a look at the effect of chalk powder on mechanical homes of those hybrid composites. It is also found that because the chalk powder quantity increases tensile and flexural residences are decreases.

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 Composites: Morphological and Mechanical Properties

2011 ◽  
Vol 332-334 ◽  
pp. 121-125
Author(s):  
Xing Mei Guo ◽  
Yi Ping Qiu
Keyword(s):  
Polymer Composites ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Hemp Fiber ◽  
Plant Fibers ◽  
Natural Plant ◽  
Reinforcing Fillers

The use of natural plant fibers as reinforcing fillers in fiber-polymer composites has drawn much interest in recent years. Natural plant fibers as reinforcing fillers have several advantages over inorganic fillers such as glass fibers; they are abundant, readily available, renewable, inexpensive, biodegradable, of low density, and of high specific strength. Hemp fibers are one of the most attractive natural plant fibers for fiber-reinforced composites because of their exceptional specific stiffness. In this review, we summarize recent progress in developments of the hemp fiber reinforced composites such as hemp fiber reinforced unsaturated polyester (UPE), hemp fiber reinforced polypropylene (PP), hemp fiber reinforced epoxy composites, and so on, illustrate with examples how they work, and discuss their intrinsic fundamentals and optimization designs. We are expecting the review to pave the way for developing fiber-polymer composites with higher strength.

Impacts of Molding Pressure on Performances of Kraft Fiber Reinforced Unsaturated Polyester Composites

2011 ◽  
Vol 183-185 ◽  
pp. 2173-2177 ◽  
Author(s):  
Xin Ying Lv ◽  
Die Ying Ma ◽  
Yong Ming Song ◽  
Zhen Hua Gao
Keyword(s):  
Mechanical Properties ◽  
Creep Resistance ◽  
Unsaturated Polyester ◽  
Resin Content ◽  
Molding Pressure ◽  
The Novel ◽  
Fiber Reinforced ◽  
Low Viscosity ◽  
Plastic Composite ◽  
The Many

Novel Kraft fiber reinforced unsaturated polyester (UPE) composites were prepared at various molding pressures in order to investigate the effects of molding pressure on resin content, the mechanical properties and creep resistance. The results indicated that the novel composites had much higher mechanical properties and better creep resistances than traditional wood plastic composites because of the applications of strong Kraft fibers as reinforcement and thermosetting UPE as matrix. Molding pressure had various effects on the many properties of composites. With molding pressure increased from 6MPa to 25MPa, the mechanical properties and creep resistances increased gradually until about 20MPa and then decreased, which were attributed to the different interface adhesions between UPE resin and Kraft fibers at various molding pressures as evidenced by DMA analysis. Benefited from the use of low-viscosity UPE resin, the resin content of Kraft fiber reinforced UPE composites could reduce to 28.3% while strength and creep resistance were still much better than that of the thermoplastic wood-plastic composite (WPC) with 40% polymer matrix.

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.

Validation of fatigue damage model for composites made of various fiber types and configurations

2017 ◽  
Vol 52 (9) ◽  
pp. 1183-1191 ◽  
Author(s):  
Asim Shahzad ◽  
Sana Ullah Nasir
Keyword(s):  
Composite Materials ◽  
Glass Fiber ◽  
Fatigue Damage ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Fiber Types ◽  
Fiber Reinforced ◽  
Hemp Fiber ◽  
Fatigue Data ◽  
Polyester Composites

Empirical model for predicting fatigue damage behavior of composite materials developed recently has been applied to composite materials made of different fibers in various configurations: carbon and glass fiber noncrimp fabric reinforced epoxy composites, chopped strand mat glass fiber-reinforced polyester composites, randomly oriented nonwoven hemp fiber-reinforced polyester composites, and glass/hemp fiber-reinforced polyester hybrid composites. The fatigue properties were evaluated in tension–tension mode at stress ratio R = 0.1 and frequency of 1 Hz. The experimental fatigue data were used to determine the material parameters required for the model. It has been found that the model accurately predicts the degradation of fatigue life of composites with an increase in number of fatigue cycles. The scope of applicability of this model has thus been broadened by using the fatigue data of natural fiber and noncrimp fabric composites.

Research on the Influence of the Tension on Dielectric Strength of the Unidirectional Direction Glass Fiber Reinforced Composites

2013 ◽  
Vol 734-737 ◽  
pp. 2230-2235 ◽  
Author(s):  
Fang Tian ◽  
Su Li Xing ◽  
Ying She Luo
Keyword(s):  
Tensile Stress ◽  
Glass Fiber ◽  
Unsaturated Polyester ◽  
Longitudinal Direction ◽  
Dielectric Strength ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Unidirectional Glass

Based on the experimental measurements of materials dielectric strength, this paper is focused on the relationships between dielectric strength of the materials and tensile stress applied on them. The experimental results indicated that the dielectric strengths of the unsaturated polyester resin and the unidirectional glass fiber reinforced composites had an obvious decrease compared with the samples without of it. Furthermore, the dielectric strength decreased with the increase of tensile stress. When tensile stress reached 50% of the material tensile strength, the dielectric strength of the resin decreased 13.36%, and the unidirectional glass fiber reinforced unsaturated polyester composites decreased 19.86% with the tensile stress in the longitudinal direction and 12.06% in the transverse direction. When the experimental samples were broken down by electricity, cracks and pores which would lead to stress concentration were created between the electrodes around the breaking-down point. In a word, it is vital to make a research about the effect of stress on the insulating properties of materials.

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