On the polymerisation of the epoxidised biodiesel: The importance of the epoxy rings position, the process and the products
| Autor: | Quelen Bulow Reiznautt, Arthur Lygeros das Chagas, Denise dos Santos Martini, Aline Nicolau, Dimitrios Samios, Clarisse M.S. Piatnick |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Biodiesel
food.ingredient Materials science Polymers and Plastics Sunflower oil Organic Chemistry General Physics and Astronomy Epoxy Catalysis Polyester chemistry.chemical_compound Oleic acid food chemistry visual_art Materials Chemistry visual_art.visual_art_medium Organic chemistry Glass transition Triethylamine |
| Zdroj: | European Polymer Journal. 48:1266-1278 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/j.eurpolymj.2012.04.013 |
| Popis: | Polyesters were prepared using epoxidised methyl esters of oleic acid (EP OAME ) and epoxidised biodiesel (mixture of methyl esters) from sunflower oil (EP SOME ) and linseed oil (EP LOME ) with cis-1,2-cyclohexanedicarboxylic anhydride and triethylamine. The kinetic of partial processes involved in the polymerisation were elucidated and related to epoxy rings position in the fatty acid chain. The activation energies ( E a ) for the epoxy ring opening by the catalyst are 298, 216 and 136 kJ/mol for EP OAME , EP SOME and EP LOME respectively. The reactions of the epoxy rings in the positions C9–C10, C12–C13 and C15–C16 with anhydride require average activation energies of 116, 32 and 22 kJ/mol, respectively. The compensation effect between activation energy and pre-exponential factor is observed. The polymerisation enthalpy, molecular weight, glass transition temperature and electrical properties were determined. The polyesters studied show promising properties for use in various technological applications. |
| Databáze: | OpenAIRE |
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