Durability study of glass fiber reinforced polypropylene sheet under simulated seawater sea sand concrete environment

Dong, Shaoce; Zhou, Ping; Guo, Rui; Li, Chenggao; Xian, Guijun

doi:10.1016/j.jmrt.2022.07.097

Cited by 23 publications

(13 citation statements)

References 60 publications

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“…Corrosion of glass fibers in the simulated SWSC solution has been widely reported 32,33,46,47 and this could be explained by the chemical reaction between the silicate structure of glass fibers and hydroxide ions from the solution 48 . In addition, the exchange of the alkali metal ion (Na + , K + ) from the simulated SWSC solution and the cations (Ca 2+ , Mg 2+ ) from E‐glass fibers was considered as a reason for the corrosion of glass fibers 49,50 …”

Section: Resultsmentioning

confidence: 99%

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Durability of glass fiber reinforced thermoplastic polypropylene composite bars under the coupling effect of seawater and sea sand concrete environment and sustained bending

Dong,

Qi,

Tian

et al. 2023

Polymer Composites

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The long‐term interfacial shear strength (IFSS) and flexural strength of GFPP bars under the coupling effect of bending and immersion in the simulated seawater and sea sand concrete (SWSC) solution were studied by an acceleration experiment. Three temperatures and three bending stress levels (0%, 9.8%, and 29.4% of the maximum flexural strain of GFPP bars) were used to accelerate the experiment. Results indicate that the degradation of mechanical properties of GFPP bars is relatively sensitive to the immersion temperature. Low bending stress did not accelerate the degradation of GFPP bars compared with unbent GFPP bars while high bending stress dramatically accelerated the degradation. Microscopic tests found there is corrosion of glass fibers and debonding between glass fibers and polypropylene but no obvious chain breaks of polypropylene occurred. Based on the Arrhenius theory, long‐term stable retention rates of the IFSS of GFPP bars with zero and low bending stress immersed in the simulated SWSC solution are 42.4% and 52.3%.Highlights Low‐stressed GFPP bars degraded similarly or even slower than unbent GFPP bars. GFPP bars degraded mainly due to interfacial debonding and fiber corrosion. Long‐term IFSS of GFPP bars under a coupling effect was predicted.

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Section: Resultsmentioning

confidence: 99%

“…GFPP bars were produced by using GFPP prepreg sheets as raw materials and the basic properties of GFPP prepreg sheets can be found in Ref. [32].…”

Section: Materials and Aging Setupmentioning

confidence: 99%

Durability of glass fiber reinforced thermoplastic polypropylene composite bars under the coupling effect of seawater and sea sand concrete environment and sustained bending

Dong,

Qi,

Tian

et al. 2023

Polymer Composites

Self Cite

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“…Moreover, the cracks in the matrix lead to an increase in its moisture absorption, and the higher the applied stress level, the faster the rate of water molecules diffusing into the matrix and the interface at the same time, and the higher the moisture absorption rate contained in the moisture absorption equilibrium. 35,36 The moisture absorption rate is closely related to the interface properties, and the greater the moisture absorption, the more severe the interfacial degradation. Therefore, the higher the level of stress, the greater the degree of interfacial debonding.…”

Section: Destruction Formmentioning

confidence: 99%

Effect of seawater and stress coupling on the durability of carbon fibre-reinforced polymer

Jia

et al. 2022

Journal of Composite Materials

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Using pre-stressed carbon fibre reinforced polymer/plastic (CFRP) to strengthen bridge structures is currently considered a promising technology and the durability of the structure is closely related to the material property. CFRP have good corrosion resistance, but they also experience different degrees of swelling, corrosion and hydrolysis in water immersion environments. Stress accelerates this effect and leads to deterioration of the mechanical properties of the materials. This work aims to investigate the durability of CFRP grids under water, wet-dry cycles of seawater, seawater immersion and 0% fu ( fu is the ultimate tensile strength of the tested CFRP grids and it is constant stress in this paper), 30% fu, 60% fu coupled environments.Test aging time at room temperature (25°C) of 30, 60, 120, 180, 270, 360 days. The results indicate that the surface of epoxy resin is smooth at the initial moment by comparing of scanning electron microscope (SEM) image. With the increase of deterioration degree with aging time, the cavities and cracks appeared in the matrix. The epoxy resin content between the fibers decreased, and the adhesion force decreased. When the aging time is short, the tensile damage section of CFRP grid is flaky and the matrix is tightly bonded with the fiber. The later damage is mainly blow-up damage, which the fracture section is typical filiform. After CFRP grids aged for 360 days, the tensile strength decreased by 6.2%, 10.2%, 10.9% in the water, seawater solution and seawater wet-dry cycle environments. The tensile strength decreased by 10.2%, 12.3% and 20.2% under the coupling of seawater and different stress levels. A semi-empirical model of durability is proposed to provide a good reference value for the durability prediction of FRP materials.

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“…PP/FG composites are mostly favored in the developing automotive industry due to the need for lightweight and high mechanical strength. E-type glass fibers are used in a wide range of development studies of PP composites (16)(17)(18)(19)(20)(21). In glass fiber reinforced PP/ FG composites, the process generally uses E-type glass fibers, long and short fibers in shape depend-ing on their mechanical expectations.…”

Section: Introductionmentioning

confidence: 99%

Study on Recycling of Waste Glass Fiber Reinforced Polypropylene Composites: Examination of Mechanical and Thermal Properties

SÖZEN

CEVAHİR²,

Deniz

2023

Journal of the Turkish Chemical Society Section A: Chemistry

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This study presents the preparation of short glass fiber reinforced polypropylene (PP/FG) composites using with waste (post-consumer) polypropylene composite containing long glass fiber (PP/LFG) obtained from the recycling of battery covers of trucks. Waste PP/LFG composite parts were mechanically grinded before adding to PP/FG composites. An injection molding machine was used to produce the PP/FG composite test samples loading with recycled waste PP/LFG composite in the range of 1-20% by weight. Effects of recycled waste PP/LFG content on the mechanical, thermal, and morphological properties of the PP/FG composites were investigated. The following three different tests, at various waste PP/LFG ratios, were conducted: Izod/Charpy Impact test, bending test, and tensile test. Mechanical test results showed that mechanical strength of prepared PP/FG composites were not influenced by content of waste PP/LFG material up to 10 wt.%. Differential scanning calorimetry (DSC) was used for the evaluation of thermal parameters such as melting point and crystallization temperature of the polymer matrix in the composites studied. Furthermore, by analyzing the values of thermal effects determined using the DSC method, it was possible to determine the degree of crystallinity. The DSC results showed that crystallinity %, melting, and crystallization temperatures of PP/FG composites were not influenced to adding waste PP/LFG at different ratios. The morphology of composite materials was investigated by SEM analysis. Good fiber dispersion was observed in the PP matrix for PP/FG composites containing short glass fiber prepared with all ratios of recycled waste PP/LFG material containing long glass fiber.

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Durability study of glass fiber reinforced polypropylene sheet under simulated seawater sea sand concrete environment

Cited by 23 publications

References 60 publications

Durability of glass fiber reinforced thermoplastic polypropylene composite bars under the coupling effect of seawater and sea sand concrete environment and sustained bending

Durability of glass fiber reinforced thermoplastic polypropylene composite bars under the coupling effect of seawater and sea sand concrete environment and sustained bending

Effect of seawater and stress coupling on the durability of carbon fibre-reinforced polymer

Study on Recycling of Waste Glass Fiber Reinforced Polypropylene Composites: Examination of Mechanical and Thermal Properties

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