Flexible, hard, and tough biobased polyurethane thermosets from renewable materials: glycerol and 10-undecenoic acid
| Autor: | Kothapalli V S N Raju, Shaik Allauddin, Varaprasad Somisetti, Ramanuj Narayan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Chemical resistance Materials science Methylene diphenyl diisocyanate 02 engineering and technology Surfaces and Interfaces General Chemistry Epoxy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Epoxide Compound 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Colloid and Surface Chemistry chemistry Polyol visual_art Glycerol visual_art.visual_art_medium Organic chemistry Thermal stability 0210 nano-technology Polyurethane |
| Zdroj: | Journal of Coatings Technology and Research. 15:199-210 |
| ISSN: | 1935-3804 1547-0091 |
| Popis: | The main theme of this work is to develop 100% biobased low viscous polyols from renewable resources. An epoxide compound (UA-GLY-E) was synthesized through esterification of glycerol and 10-undecenoic acid preceded by peroxidation. For the first time, UA-GLY-E was utilized as a building block in the generation of low viscous polyols and polyurethanes therefrom. The biobased polyols were synthesized by epoxide ring opening of UA-GLY-E with different nucleophiles, namely glycerol, water, and methanol. The advantage of these biobased polyols is their low viscosity and at the same time high functionality. These biobased polyols were further converted into poly(urethane–urea) coatings by reacting with methylene diphenyl diisocyanate. The impact of peripheral structural change in the polyols on the properties of polyols and their polyurethane coatings was studied. Flexible, hard, and tough thermosets have been prepared successfully from the same epoxy compound by altering the peripheral moiety in the polyol structure. Biobased polyurethanes prepared from glycerol and water-based polyols have shown better crosslinking density over the methanol-based polyol. Moreover, these biobased polyurethane films have shown good thermal stability, mechanical strength, and chemical resistance as well. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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