CHARACTERIZATION OF RUBBER-LIKE MATERIAL OBTAINED FROM WASTE BIODIESEL

Author(s):  
Krasimira Georgieva ◽  
Yordan Denev

A new polymeric material as result from long term polymerization of waste biodiesel was synthesized. The rubber-like material was produced for six years storage in open container at normal conditions and air presence. The block synthesis of rubber materials may be very useful comparing with the expensive emulsion and solution processes used in the rubber industry. The nature of the new material, called by authors Nanifam, can be described definitely as polyacrylate rubber in oligomeric state and density of 0.95 kg/m3. Polyacrylate rubbers have significant usage in the polymer industry. They have very strong resistance to oils and solvents as well as good behaviour at high temperatures (up to 150 - 200 oC). The most popular application of this rubber is as insulations and protective coatings. The identification of invented by spontaneous polymerization reaction rubber was carried out using standard chemical techniques, color analytical reactions and FT-IR spectroscopy as a primary structural instrumental method. The peaks in registered spectra of new polyacrylate rubber have typical shape and wave numbers described polymer with hydrocarbon chain (-CH2-CH-), carbonyl groups (-C=O) and typical functional acrylate groups. The results from reaction of Liebermann-Morawski definitely show behaviour similar as poly(chloroprene) rubber and poly(isoprene) rubber. The aim of present work is study on the full spectroscopic characterization of a new rubber material with polyacrylate nature and proving of the possibility for producing in block from waste biodiesel of this new polymer.

Author(s):  
X. Lin ◽  
X. K. Wang ◽  
V. P. Dravid ◽  
J. B. Ketterson ◽  
R. P. H. Chang

For small curvatures of a graphitic sheet, carbon atoms can maintain their preferred sp2 bonding while allowing the sheet to have various three-dimensional geometries, which may have exotic structural and electronic properties. In addition the fivefold rings will lead to a positive Gaussian curvature in the hexagonal network, and the sevenfold rings cause a negative one. By combining these sevenfold and fivefold rings with sixfold rings, it is possible to construct complicated carbon sp2 networks. Because it is much easier to introduce pentagons and heptagons into the single-layer hexagonal network than into the multilayer network, the complicated morphologies would be more common in the single-layer graphite structures. In this contribution, we report the observation and characterization of a new material of monolayer graphitic structure by electron diffraction, HREM, EELS.The synthesis process used in this study is reported early. We utilized a composite anode of graphite and copper for arc evaporation in helium.


2001 ◽  
Vol 74 (6) ◽  
pp. 794 ◽  
Author(s):  
Antoine Royant ◽  
Karl Edman ◽  
Thomas Ursby ◽  
Eva Pebay-Peyroula ◽  
Ehud. M. Landau ◽  
...  

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