TSDC and DSC Study of Effects of Physical Aging on Polybutylene Terephthalate (PBT)

Souilem, S.; Doulache, N.; Khemici, M. W.; Gourari, A.

doi:10.1080/1023666x.2014.873610

Cited by 10 publications

(6 citation statements)

References 20 publications

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“…Therefore, in the range of temperatures analyzed, the chemical degradation is not significant. Similar results for DSC were found by Ma et al [ 45 ] and Souilem et al [ 46 ] for fiber-free PBT.…”

Section: Resultssupporting

confidence: 90%

Effect of Water Ingress on the Mechanical and Chemical Properties of Polybutylene Terephthalate Reinforced with Glass Fibers

et al. 2021

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Short fiber reinforced polymers are widely used in the construction of electronic housings, where they are often exposed to harsh environmental conditions. The main purpose of this work is the in-depth study and characterization of the water uptake behavior of PBT-GF30 (polybutylene terephthalate with 30% of short glass fiber)as well as its consequent effect on the mechanical properties of the material. Further analysis was conducted to determine at which temperature range PBT-GF30 starts experiencing chemical changes. The influence of testing procedures and conditions on the evaluation of these effects was analyzed, also drawing comparisons with previous studies. The water absorption behavior was studied through gravimetric tests at 35, 70, and 130 ∘C. Fiber-free PBT was also studied at 35 ∘C for comparison purposes. The effect of water and temperature on the mechanical properties was analyzed through bulk tensile tests. The material was tested for the three temperatures in the as-supplied state (without drying or aging). Afterwards, PBT-GF30 was tested at room temperature following water immersion at the three temperatures. Chemical changes in the material were also analyzed through Fourier-transform infrared spectroscopy (FTIR). It was concluded that the water diffusion behavior is Fickian and that PBT absorbs more water than PBT-GF30 but at a slightly higher rate. However, temperature was found to have a more significant influence on the rate of water diffusion of PBT-GF30 than fiber content did. Temperature has a significant influence on the mechanical properties of the material. Humidity contributes to a slight drop in stiffness and strength, not showing a clear dependence on water uptake. This decrease in mechanical properties occurs due to the relaxation of the polymeric chain promoted by water ingress. Between 80 and 85 ∘C, after water immersion, the FTIR profile of the material changes, which suggests chemical changes in the PBT. The water absorption was simulated through heat transfer analogy with good results. From the developed numerical simulation, the minimum plate size to maintain the water ingress unidirectional was 30 mm, which was validated experimentally.

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Section: Resultssupporting

confidence: 90%

Effect of Water Ingress on the Mechanical and Chemical Properties of Polybutylene Terephthalate Reinforced with Glass Fibers

et al. 2021

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“…In addition to the thermo‐oxidative aging, the effects of physical aging should be considered . The phenomenon of physical aging occurs in a broad range of polymers including amorphous and semicrystalline polymers, due to the changes in free volume and chain mobility over time as a result of quenching from above to below the T g .…”

Section: Resultsmentioning

confidence: 98%

Sustainable biocarbon as an alternative of traditional fillers for poly(butylene terephthalate)‐based composites: Thermo‐oxidative aging and durability

Chang

Mohanty

Misra

2019

J of Applied Polymer Sci

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Sustainable biocomposites have gained considerable interest as an alternative to conventional composites in recent years due to their cost‐effectiveness and environmental friendliness. The aim of this study was to investigate the performance and durability behavior of biocomposites from sustainable biocarbon (BC) as compared to conventional established fillers. The poly(butylene terephthalate) (PBT) and its composites reinforced with BC, talc, and glass fiber (GF) were prepared and the durability performances was investigated. The study showed that BC/PBT biocomposites provided a lighter weight alternative to traditionally used fillers. After undergoes thermo‐oxidative aging, the mechanical properties of BC/PBT biocomposite were deteriorated. The GF/PBT showed the most stable in retaining its mechanical properties in comparison to the talc/PBT and BC/PBT. The aging behavior and mechanism of the PBT composites were discussed. This study provides further insight on the durability‐related properties progression of biocomposites as compared to traditional used fillers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47722.

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“…Souilem et al [ 16 ] studied the electrical aging performance of PBT using a thermal-stimulated depolarization current method. In another study, the effects of physical aging processes on the electrical and thermal properties of semi-crystalline PBT were investigated [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Aging on Mechanical Properties and Morphology of GF/PBT Composites

Xu,

Deng,

Nie

et al. 2023

Polymers

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The effects of thermal aging at 85~145 °C in air on the tensile and flexural mechanical properties of 20% glass fiber (GF)-reinforced commercial grade polybutylene terephthalate (PBT) composites were studied. The results showed that as the aging temperature increased, the tensile and flexural strength of the GF/PBT composites significantly decreased. However, the elastic modulus of the composites was almost independent of aging. As the aging temperature increased, the separation between GF and the PBT matrix became more pronounced, and the fibers exposed on the surface of the matrix became clearer and smoother, indicating a decrease in interfacial adhesion between the PBT matrix and GF. The reason for this decrease in strength and brittle fracture of composites is the interface damage between the GF and PBT matrix caused by the difference in their thermal expansion coefficients during thermal aging.

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TSDC and DSC Study of Effects of Physical Aging on Polybutylene Terephthalate (PBT)

Cited by 10 publications

References 20 publications

Effect of Water Ingress on the Mechanical and Chemical Properties of Polybutylene Terephthalate Reinforced with Glass Fibers

Effect of Water Ingress on the Mechanical and Chemical Properties of Polybutylene Terephthalate Reinforced with Glass Fibers

Sustainable biocarbon as an alternative of traditional fillers for poly(butylene terephthalate)‐based composites: Thermo‐oxidative aging and durability

Effect of Thermal Aging on Mechanical Properties and Morphology of GF/PBT Composites

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