Ageing properties of car fuel-lines; accelerated testing in “close-to-real” service conditions

Kallio, Kai J.; Nageye, Arbi S.; Hedenqvist, Mikael S.

doi:10.1016/j.polymertesting.2009.09.003

Cited by 12 publications

(2 citation statements)

References 11 publications

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“…12,13 These interactions require a reassessment of both the short-term and long-term performance of polymer components in contact with biodiesel to achieve a problem-free fuel switch in vehicles. [14][15][16] Polyamides (PAs) such as PA12 and PA6 are commonly used in vehicle fuel systems because of their good balance of mechanical properties and barrier properties against hydrocarbons, [17][18][19][20] but the degradation of PAs in diesel, biodiesel, or mixtures of these has been scarcely investigated. Choudhury et al 21 reported that both the tensile strength and the elastic modulus of PA6 decreased by 20% after 1-week exposure to biodiesel at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Ageing properties and polymer/fuel interactions of polyamide 12 exposed to (bio)diesel at high temperature

et al. 2019

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Biodiesel derived from oil crops and animal fats has been developed as a promising carbon-neutral alternative to petroleum fuels in the transport sector, but the compatibility between biodiesel/petroleum diesel and polymer components in the automotive fuel system has not been free from controversy. In this present study, the degradation of polyamide 12 (PA12), one of the most common polymers used in vehicle fuel systems, has been investigated after exposure to petroleum diesel, biodiesel and a mixture of these (20 vol.% of biodiesel/80 vol.% petroleum diesel). Fuel sorption kinetics, glass transition temperature data and mechanical properties all showed that the fuels plasticized the PA12. In addition, monomers and oligomers were extracted from PA12 by the fuels. The long-term exposure led to oxidation and an annealing-induced increase in crystallinity of the polymer. The plasticization, oxidation and annealing effects were combined with the tensile mechanical properties to assess the overall degree of ageing and degradation of the PA12 material. The fuel-polymer interactions and ageing mechanisms, demonstrated here at high temperature for PA12, are 'generic' in the sense that they are also expected to occur, to various degrees, with many other polymers and they indicate that care should be taken when choosing polymers in applications where they will be exposed to fuels at high temperature.

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Section: Introductionmentioning

confidence: 99%

Ageing properties and polymer/fuel interactions of polyamide 12 exposed to (bio)diesel at high temperature

et al. 2019

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“…Poly(ethylene) and poly(amide) are typically polymeric materials encoutered for tank and fuel line applications, respectively. A limited number of works have been published in the literature on the area of compatibility of such polymers with alternative fuels, and experimental data are scarce. ,− …”

Section: Introductionmentioning

confidence: 99%

Prediction of Alternative Gasoline Sorption in a Semicrystalline Poly(ethylene)

2015

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In this work, we first report the acquisition of new experimental data and then the development of quantitative structure-property relationships on the basis of sorption values for neat compounds and up to quinary mixtures of some hydrocarbons, alcohols, and ethers, in a semicrystalline poly(ethylene). Two machine learning methods (i.e., genetic function approximation and support vector machines) and two families of descriptors (i.e., functional group counts and substructural molecular fragments) were used to derive predictive models. Models were then used to predict sorption variations when increasing the number of carbon atoms in a series of hydrocarbons and for n-alkan-1-ols. In addition to the performed internal/external validations, the model was further tested for surrogate gasolines containing ca. 300 compounds, and predicted sorption values were in excellent agreement with experimental data (R(2) = 0.940).

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Performance Evaluation of Polyamide-12 Pipe Serviced in Acid Oil and Gas Environment

Yan

et al. 2021

J Fail. Anal. and Preven.

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Ageing properties of car fuel-lines; accelerated testing in “close-to-real” service conditions

Cited by 12 publications

References 11 publications

Ageing properties and polymer/fuel interactions of polyamide 12 exposed to (bio)diesel at high temperature

Ageing properties and polymer/fuel interactions of polyamide 12 exposed to (bio)diesel at high temperature

Prediction of Alternative Gasoline Sorption in a Semicrystalline Poly(ethylene)

Performance Evaluation of Polyamide-12 Pipe Serviced in Acid Oil and Gas Environment

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