Environmental effects on the mechanical properties of glass-fiber epoxy composite tubular specimens

Ellyin, F.; Maser, Rachel

doi:10.1016/j.compscitech.2004.01.017

Cited by 168 publications

(104 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This in turn may have led to dissolving and leaching of these elements from the glass fiber. These results support the observation by Ellyin and Maser that in hot water environment leaching could occur at the fiber/matrix interface [10].…”

Section: Conditioning and Water Absorptionsupporting

confidence: 87%

“…A number of researchers have investigated the effect of moisture and temperature on glass/epoxy composites [6][7][8][9][10]. Absorption of distilled water and seawater in glass/epoxy composites has been noticed to cause changes in the thermophysical, mechanical, and chemical characteristics of the epoxy matrix by plasticization and hydrolysis [6,8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Seawater and Warm Environment on Glass/Epoxy and Glass/Polyurethane Composites

et al. 2010

View full text Add to dashboard Cite

A study of the durability of fiber reinforced polymer (FRP) materials in seawater and warm environment is presented in this paper. The major objective of the study is to evaluate the effects of seawater and temperature on the structural properties of glass/epoxy and glass/polyurethane composite materials. These effects were studied in terms of seawater absorption, permeation of salt and contaminants, chemical and physical bonds at the interface, degradation in mechanical properties, and failure mechanisms. Test parameters included immersion time, ranging from 3 months to 1 year, and temperature including room temperature and 65°C. Seawater absorption increased with immersion time and with temperature. The matrix in both composites was efficient in protecting the fibers from corrosive elements in seawater; however moisture creates a dual mechanism of stress relaxation-swelling-mechanical adhesion, and breakdown of chemical bonds between fiber and matrix at the interface. It is observed that high temperature accelerates the degradation mechanism in the glass/polyurethane composite. No significant changes were observed in tensile strength of glass/epoxy and in the modulus of both glass/epoxy and glass/polyurethane composites. However, the tensile strength of the glass/polyurethane composite decreased by 19% after 1 year of exposure to seawater at room temperature and by 31% after 1 year of exposure at 65°C. Plasticization due to moisture absorption leads to ductile failure in the matrix, but this can be reversed in glass/polyurethane composites after extended exposure to seawater at high temperature where brittle failure of matrix and fiber were observed.

show abstract

Section: Conditioning and Water Absorptionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Effect of Seawater and Warm Environment on Glass/Epoxy and Glass/Polyurethane Composites

et al. 2010

View full text Add to dashboard Cite

show abstract

“…This result is contrary to expectation, as composites with fiber reinforcement, whether treated or untreated, should exhibit higher water absorption due to the inherent hydrophilic nature of the filler [22] [30] [37]- [41]. However, water absorption depends on several factors, namely the type of fiber, its loading and orientation, area of exposed surface, interfacial adhesion, voids, and surface protection [41] [42]. Sample (T20 600) and the U25 300 CONTROL T20 600 U20 600 T20 300 Hardness Shore Scare D Samples control sample have more voids in them as compared to other samples and this explains the high initial rate of water absorption [43], until all the available spaces in the composite are taken over by the water.…”

Section: Mechanical Property Testcontrasting

confidence: 51%

Effect of Groundnut Shell Powder on the Mechanical Properties of Recycled Polyethylene and Its Biodegradability

Usman¹,

Momohjimoh²,

Gimba³

2016

JMMCE

View full text Add to dashboard Cite

Natural fiber reinforced composites have gained considerable attention particularly in the manufacturing industry owing to their light weight, corrosion resistance, abundance, and biodegradability. In this work, alkaline treated and untreated groundnut shell powder (GSP) was used to reinforce recycled polyethylene to produce GSP-recycled polyethylene composites with improved mechanical properties and biodegradability. GSP with particle sizes of 0 -300 µm and 300 -600 µm was used in different proportions: 5%, 10%, 15%, 20%, 25%, and 30% wt. The fiber was immersed for 5 hours in a 10 wt% NaOH solution. Tensile and hardness test data showed an improvement in mechanical properties of the treated fiber composites. Results of water absorption test also showed that treated GSP-recycled polyethylene composites had a lower rate of water absorption than the untreated GSP-recycled polyethylene composites. Through Fourier transform infrared spectroscopy, disappearance of characteristics peaks of hemicellulose and lignin was observed. Growth of fungi on the fiber-reinforced composites was observed, which was evidence that GSP-recycled polyethylene composite was biodegradable. Finally, SEM micrographs showed uniform distribution of treated fibers in the polymer matrix; this explained the observed improvement in the mechanical properties of treated GSP-recycled polyethylene composites.

show abstract

“…WU depended on various parameters, including the type of fiber, its loading and orientation, area of the exposed surface, interfacial adhesion, voids, and surface protection. 26 We observed from the graph that the hydrophobic polymer matrix, RPP, absorbed a constant amount of water (0.2%) throughout the period of 150 days, whereas the EFBfiber-based composite, NFC, absorbed the highest amount (8.4%) of water during the same period of immersion. The GFbased composite, GFC, showed a WU value of 0.35%.…”

Section: Thermal Propertiesmentioning

confidence: 92%

Effects of fiber‐surface treatment on the properties of hybrid composites prepared from oil palm empty fruit bunch fibers, glass fibers, and recycled polypropylene

Islam

Gupta

Rivai

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this article, we report the effects of hybridization and fiber-surface modification on the properties of hybrid composites prepared from recycled polypropylene (RPP), coupling agents, oil palm empty fruit bunch (EFB), and glass fibers through a twinscrew extruder and an injection-molding machine. The surface of the EFB fibers was modified with different concentrations (10-15 wt %) and temperatures (60-908C) of alkali solutions. The structure and morphology of the fibers were observed with the help of Fourier transform infrared spectroscopy and scanning electron microscopy. Different types of composites were fabricated with untreated, alkali-treated, and heat-alkali-treated fibers. Comparative analysis of the mechanical, structural, morphological, and thermal properties of the composites was carried out to reveal the effects of treatment and hybridization. The analysis results reveal that composites prepared from the alkali-treated (in the presence of heat) fibers show improved mechanical, thermal, and morphological properties with a remarkably reduced water absorption. Additionally, the crystallinity of RPP also increased with the development of biaxial crystals. The improvement of various properties in relation to the structures and morphologies of the composites is discussed.

show abstract

Environmental effects on the mechanical properties of glass-fiber epoxy composite tubular specimens

Cited by 168 publications

References 17 publications

Effect of Seawater and Warm Environment on Glass/Epoxy and Glass/Polyurethane Composites

Effect of Seawater and Warm Environment on Glass/Epoxy and Glass/Polyurethane Composites

Effect of Groundnut Shell Powder on the Mechanical Properties of Recycled Polyethylene and Its Biodegradability

Effects of fiber‐surface treatment on the properties of hybrid composites prepared from oil palm empty fruit bunch fibers, glass fibers, and recycled polypropylene

Contact Info

Product

Resources

About