| Title | Rigid Polyurethane Foams as Thermal Insulation Material from Novel Suberinic Acid-Based Polyols |
|---|---|
| ID_Doc | 9016 |
| Authors | Ivdre, A; Abolins, A; Volkovs, N; Vevere, L; Paze, A; Makars, R; Godina, D; Rizikovs, J |
| Title | Rigid Polyurethane Foams as Thermal Insulation Material from Novel Suberinic Acid-Based Polyols |
| Year | 2023 |
| Published | Polymers, 15.0, 14 |
| Abstract | Developing polyols from biomass sources contributes to a more circular economy by replacing petroleum-based polyols in the vast production of polyurethanes (PUR). One such potential biomass source could be leftover birch bark from which suberinic acids (SA) can be obtained. The purpose of this study was to identify the best synthesis routes for novel SA-based polyols, obtain rigid PUR foams, and evaluate their competitiveness and potential suitability as thermal insulation material. Novel polyols were synthesized from depolymerized SA by esterification with various functionality and molecular weight alcohols in several molar ratios. The moisture content, hydroxyl and acid values, and apparent viscosity were tested. Free-rise rigid PUR foams from the most suitable SA-based polyol and tall oil-based polyol were successfully prepared, reaching similar to 20 wt.% total renewable material content in the foam. The obtained rigid PUR foams' morphological, mechanical, and thermal properties were investigated and compared to present foam materials, including commercial foams. The apparent density (similar to 33 kg/m(3)), as well as the closed cell content (similar to 94%), compression strength (0.25 MPa, parallel to the foaming direction), and thermal conductivity (similar to 0.019 W/(m(.)K)), approved the competitiveness and potential ability of SA-based rigid PUR foam production as thermal insulation material. |
| https://www.mdpi.com/2073-4360/15/14/3124/pdf?version=1690193014 |
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