Mechanical and thermal characteristics of a polyurethane processed from hyguerilla oil (ricinus communis) for the adhesion of structural elements of guadua angustifolia kunth
Published 2020-07-29
Keywords
- adhesive,
- castor oil,
- thermal diffusivity,
- specific heat,
- photoacoustic
- thermal relaxation,
- mechanical resistance ...More
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Abstract
In recent decades, the search for raw from renewable resources to produce polymers, elastomers, resins, foams, etc., has intensified; these materials would reduce the industrial use of petrochemical compounds. In this work, the oil extracted from the castor oil seed (Ricinus communis) was used because of ricinoleic acid content (92.3%), it is of easy production and non-edible vegetable origin. The polyurethane adhesive was synthesized through transesterification and polymerization reactions. Using the corresponding standards, this adhesive was applied to sheets of Guadua angustifolia Kunth for determining its mechanical characteristics, the compressive strength parallel to the fiber was 43±3 (MPa), and shear parallel to the fiber was 5.9±0.9 (MPa). Fourier transform infrared spectroscopy was used for determining the appropriate molar ratio and monitoring the reaction during the synthesis and final product structure was analyzed with X-ray diffraction. Through differential scanning calorimetry, the glass transition temperature of the product was estimated on -24.6 °C; the thermal relaxation technique was used to measure its specific heat, while its thermal diffusivity and thermal expansion coefficient were estimated with the photoacoustic technique.
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References
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