This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analysis of the Deterioration of Nylon-66 Immersed in GTL Diesel Fuel Part 2. Analysis of Model Fuel and Nylon Before and After Immersion
Technical Paper
2006-01-3327
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In a previous paper (Part 1 of this series), nylon-66 specimens were immersed in two GTL diesel fuels (GTL-A and GTL-B) and then subjected to tensile testing. The tensile test results revealed that the elongation of the specimen immersed in GTL-A was dramatically reduced. The GTL diesel fuels and nylon specimens before and after immersion were analyzed to determine the cause of the decline in elongation. It was found that the poor elongation was caused by penetration and oxidation of low molecular-weight paraffins and that the ease of penetration and oxidation of paraffin depended on the structure of paraffin.
In this paper, the low molecular-weight paraffins detected in GTL-A were mixed to produce model fuels. Then, pieces of nylon cut from the tensile test specimen, were immersed in the model fuels. In addition, partial oxidation products of the paraffin (alcohol, aldehyde or ketone and acid) were used in immersion tests of the nylon pieces. It was found that: (1) The quaternary carbon atom in i-paraffin hardly oxidizes, while the tertiary carbon atom in i-paraffin readily oxidizes to give alcohol. (2) 2-Methyl-paraffin produced 100 times as many oxidation products as n-paraffin. (3) The lower the carbon number of a paraffin is, the easier it penetrates the nylon samples. (4) The degree of oxidation of nylon corresponded with the tendency of paraffin to oxidize. (5) The composition of the oxidation products of paraffin, which were detected in the nylon after the immersion test, was nearly the same as that of the oxidation products of paraffin itself. (6) Oxidation products of the paraffin outside of the nylon had no influence on the oxidation of the inner layer of nylon. Rather, the free radicals that oxidized the inner layer of nylon were generated from the paraffin that entered the nylon.
Recommended Content
Authors
Citation
Ogawa, T., Ohshima, A., Nakai, K., Okamoto, K. et al., "Analysis of the Deterioration of Nylon-66 Immersed in GTL Diesel Fuel Part 2. Analysis of Model Fuel and Nylon Before and After Immersion," SAE Technical Paper 2006-01-3327, 2006, https://doi.org/10.4271/2006-01-3327.Also In
References
- Hayashi Kenichi The Present and Future Trend of Automotive Fuels J. of Society of Automotive Engineers of Japan 47 1 1993 29 34
- Kaneko Takashi Akiyama Masanari Description: Low-sulfurization of diesel fuel Nisseki-Review 39 4 1997 27 30
- Sekimoto Masanori Description: Influence of Gasoline Properties on Emission and Influence of Low-sulfurization of Diesel Fuel on Lubricity of the fuel Nisseki-Review 39 1 1997 16 18
- Tucker R.F. Stradling R.J. Wolveridge P.E. Rivers K.J. Ubbens A. The Lubricity of Deeply Hydrogenated Diesel Fuels - The Swedish Experience SAE 942016
- Suppes G..J. Lula C.J. Burkhart M.L. Swearingen J.D. Type Performance of Fischer-Tropsch Liquids (FTL) in Modified Off-Highway Diesel Engine Test Cycle SAE 1999-01-1474
- Knottenbelt Cyril Mossgas “gas-to-liquid” diesel fuels --- an environmentally friendly option Catalysis Today 71 2002 437 445
- Frame E.A. Alvarez R.A. Blanks Matthew G. Freeks Robert L. Stavinoha Leo L. Muzzell Patsy A. Villahermosa Luis Alternative Fuels: Assessment of Fischer Tropsch Fuel for Military Use in 6.5L Diesel Engine
- Tsukasaki Yukihiro Technical Trends of GTL Fuels for Automobiles J. of Society of Automotive Engineers of Japan 55 5 2001 67 72
- Report of the Organic Material Group of the All Toyota Material Engineering Research Meeting
- Ogawa Tadao Ohshima Ayako Kajiya Syuji Murase Atsushi Suzuki Yasuyuki Hayashi Hitoshi Analysis of the Deterioation of Nylon-66 Immersed in GTL Diesel Fuel, Part 1. Analysis and Test of Nylon and GTL Diesel Fuel before and after Immersion SAE- 2006-01-3326
- Carroccio Sabrina Puglisi Concetto Montaudo Giorgio MALDI Investigation of the Photooxidation of Nylon-66 Macromolecules 37 16 2004 6037 6049