Rapeseed oil as main component in synthesis of bio-polyurethane-polyisocyanurate porous materials modified with carbon fibers |
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| Institution: | 1. Cracow University of Technology, Department of Chemistry and Technology of Polymers, Warszawska 24, 31-155 Cracow, Poland;2. Latvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, Latvia;1. Toray Research Center, Inc., Otsu, 520-8567, Japan;2. Application R&D Center, Horiba Ltd., Kyoto, 601-8510, Japan;3. Rakuyo Giken Co., Ltd., Kumiyama-cho, Kyoto, 613-0023, Japan;4. Graduate School of Science, Hiroshima University, Higashihiroshima, 739-8526, Japan;1. Department of Polymer Science & Engineering, Hannam University, Daejeon 34054, Republic of Korea;2. Underground Solutions Inc., Poway, CA 92064, USA;3. Ansco Inc., Daejeon 34051, Republic of Korea;1. Institute of Building Construction and Technology, TU Wien, Karlsplatz 13/206-4, 1040 Vienna, Austria;2. Department of Orthopaedic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria;3. Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA;4. Institute of Solid State Physics, TU Wien, Karlsplatz 13/138-4, 1040 Vienna, Austria |
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| Abstract: | Porous polyurethane-polyisocyanurate (PUR-PIR) composites have been synthesized using two types of rapeseed oil-based bio-polyols. The bio-polyols from rapeseed oil were synthesized using two methods: (i) transesterification and (ii) epoxidation followed by oxirane ring opening. The PUR-PIR porous materials were prepared with two isocyanate indices, 150 and 250, and were modified with carbon fibres (CF) in an amount of 3 and 6 wt% of the total foam mass. The structure of the composites was examined using scanning electron microscopy. Thermal and mechanical properties of the composites were determined through a thermogravimetric analysis and measurements of the thermal conductivity, compressive strength, and Young modulus. The influence of CF on the composite flammability was analyzed using oxygen index and cone calorimeter tests. The investigations of the mechanical properties have shown that the compressive strength is the most beneficial in the case of the PUR-PIR foams modified with 6 wt % of CF. The studies have shown that the oxygen index of the composites increases with an increasing CF content and isocyanate index. An addition of CF reduces the heat rate release, especially for the materials with an isocyanate index of 250. An introduction of CF into the PUR-PIR foam structure is a way to improve the thermal stability and to decrease the flammability of final porous composites. |
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| Keywords: | Rapeseed oil Carbon fibres Particle-reinforced composites Thermal properties Thermogravimetric analysis TGA Flammability Thermal conductivity Compressive strength |
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