Degradation of physical properties of different elastomers upon exposure to palm biodiesel

Haseeb, A.S.M.A.; Tie, Jun; Fazal, M. A.; Masjuki, H.H.

doi:10.1016/j.energy.2010.12.023

Cited by 99 publications

(88 citation statements)

References 28 publications

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“…Haseeb et al 97 compared the change in physical properties of some polymeric materials such as ethylene propylene diene monomer (EPDM), silicone rubber (SR), polychloroprene (CR), polytetrafluroethylene (PTFE) and nitrile rubber (NBR) after 1000 h of immersion in different mixtures of palm biodiesel at 25 ºC. The authors analyzed the changes in weight, tensile strength and hardness of the materials.…”

Section: Effects Of Biodiesel On the Degradation Of Polymeric Materiamentioning

confidence: 99%

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Zuleta¹,

Baena

Ríos³

et al. 2012

J. Braz. Chem. Soc.

141

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O objetivo deste artigo é analisar as principais questões com relação às estabilidades oxidativa e de armazenamento de biodiesel e como elas afetam diferentes materiais metálicos e poliméricos presentes em peças de automóvel e em estruturas de armazenamento de biodiesel. Adicionalmente, este trabalho apresenta uma revisão das técnicas para a medição da estabilidade oxidativa e para avaliação da degradação de materiais metálicos e poliméricos. Quando biodiesel é oxidado, ocorre uma série de mudanças nas suas propriedades, tais mudanças afetam não só a qualidade do biodiesel, mas também as propriedades dos materiais que estão em contato com o biodiesel. Com a oxidação, propriedades do biodiesel como o índice de acidez, índice de peróxidos e viscosidade aumentam, entretanto os índices de iodo e teor de ésteres metílicos diminuem. As alterações das propriedades químicas e físicas do biodiesel podem afetar a integridade e a estabilidade dos materiais que estão em contato com o combustível. A atual situação relacionada com a estabilidade dos materiais revistos neste artigo poderia limitar o uso extensivo de biodiesel, como tem sido proposto em vários países, e deveria ser considerada como um fenômeno de grande importância na tecnologia de biodiesel.The purpose of this paper is to analyze the main issues concerned with the oxidative and storage stabilities of biodiesel and how they affect different metallic and polymeric materials present in automotive parts and in biodiesel storage structures. In addition, this work presents a review of the techniques used for measuring the oxidative stability and for evaluating the degradation of metallic and polymeric materials. When biodiesel is oxidized, a series of changes in its properties occurs. These changes not only affect biodiesel quality, but also the properties of the materials that are in contact with it. Upon oxidation, biodiesel properties like the acid value, peroxide value and viscosity increase, while the iodine value and the content of methyl esters decrease. The changes in the chemical and physical properties of biodiesel can affect the integrity and stability of the material. The situation reviewed in this paper, which talks about the stability of materials, could limit the extensive use of biodiesel. Such measures have been proposed in several countries, and it is a topic of great importance for biodiesel technology.

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Section: Effects Of Biodiesel On the Degradation Of Polymeric Materiamentioning

confidence: 99%

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Zuleta¹,

Baena

Ríos³

et al. 2012

J. Braz. Chem. Soc.

141

View full text Add to dashboard Cite

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“…In addition, hygroscopic nature of biodiesel may introduce water into polymer matrix. Diffusion of water into polymer matrix can also deteriorate the mechanical properties [12]. Table-1 represents the hardness of as-received PPA and hardness after the immersion at different conditions.…”

Section: Resultsmentioning

confidence: 99%

“…As compared to room temperature, mass of PPA in pure biodiesel at 50 °C and 75 °C for 120 h are increased by 3.712 and 11.48 %, respectively and 1.939 and 13.242 %, respectively for PAA. The major cause for the increased mass can be explained by the higher rate of diffusion of biodiesel in PPA and PAA at elevated temperatures [12]. Effect of exposure time in change in mass: Fig.…”

Section: Resultsmentioning

confidence: 99%

Deterioration of Automotive Polymeric Materials in Exposed to Pongamia pinnata Biodiesel

Meenakshi¹,

Sah²,

Sah³

2017

Asian J. Chem.

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Material compatibility with biodiesels and their blends should be verified on a case-by-case basis to ensure long term durability of storage tanks and pipelines. This paper aimed to investigate the degradation of physical properties such as mass, volume, tensile strength, hardness and change in surface morphology for polymers namely polypthalamide (PPA) and polyarylamide (PAA) upon exposure to Pongamia pinnata biodiesel (PPB) and blends. Static immersion tests in B0, B10, B20 and B100 were carried out at 25, 50 and 75 °C for 120, 360 and 720 h to estimate the degradation behaviour of polymers under static condition. Rotating cage was used to study the degradation behaviour at room temperature for 120 h under flow conditions. Significant changes in the physical properties and surface morphology was observed. The overall compatibility sequence of polymers in Pongamia pinnata biodiesel under static condition was found to be PAA > PPA while under flow condition, the order is and PPA > PAA under flow condition.

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“…However, biodiesel is more oxidative than petrodiesel due to the presence of unsaturated fatty acids [8] which enhance corrosion and material degradation [9][10][11]. Due to this behavior, the compatibility of biodiesel with elastomers is a growing concern as these materials are widely employed in the fuel system and in many engine parts [10][11][12][13][14][15][16]. When swollen by fuel rubber may contain liquid like components (fuel and dissolved components in pores), gel-like component (swollen rubber matrix) and solidcomponent (intact rubber).…”

Section: Introductionmentioning

confidence: 98%

Comprehensive multiphase NMR spectroscopy: A new analytical method to study the effect of biodiesel blends on the structure of commercial rubbers

Silva

Filho

Simpson

et al. 2016

Fuel

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h i g h l i g h t sWe evaluate the effect of biodiesel on commercial rubber at molecular level. The new CMP-NMR probe was successful to study the phases in the fuel-rubber system. We observed that the biodiesel penetrates at EPDM despite the opposite report. It is observed the increasing on rubbers softening after biodiesel immersion. a b s t r a c t Biodiesel has been incorporated into the energy matrix in several countries, but its compatibility with some materials used in automotive engines is of growing concern. In the present study, comprehensive multiphase (CMP) NMR is applied to understand the different phases in fuel-rubber systems. CMP NMR is a novel technology that integrates all the hardware from solution-, gel-and solid-state into a single NMR probe, permitting all phases to be studied in samples in their natural unaltered state. Transverse relaxation experiments in combination with inverse diffusion editing permit the increasing mobility of the rubbers chains with biodiesel exposure to be monitored. Conversely diffusion editing and RADE experiments highlight the more rigid domains. In summary NR and NBR showed the absence of highly rigid domains after exposure to biodiesel whereas SBR and EPDM especially better retained their structural integrity. 13 C editing protocols and 13 C-1 H HSQC confirmed the increasing gel-like properties of NR, NBR and SBR with exposure to biodiesel. However, variable contact time experiments showed that biodiesel penetrates even the most resilient EPDM pores causing relaxation of the polymer chains and demonstrates that NMR is sensitive enough to highlight even the very slight swelling of the EPDM. Through these results it is possible to observe that the elastomer that exhibits the lowest susceptibility to biodiesel in molecular terms was EPDM, followed by SBR, NR, and NBR. It was also observed that biodiesel molecules were present in the EPDM structure despite the literature reporting its general resilience to biodiesel.

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Degradation of physical properties of different elastomers upon exposure to palm biodiesel

Cited by 99 publications

References 28 publications

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Deterioration of Automotive Polymeric Materials in Exposed to Pongamia pinnata Biodiesel

Comprehensive multiphase NMR spectroscopy: A new analytical method to study the effect of biodiesel blends on the structure of commercial rubbers

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