Bio-polyurethane foams modified with a mixture of bio-polyols of different chemical structures
Authors:
- Aleksander Prociak,
- Maria Kurańska,
- Katarzyna Uram,
- Monika Wójtowicz
Abstract
We report on rigid polyurethane (PUR) foams prepared using different contents of a mixture of two bio-polyols (20–40 php). The bio-polyols were obtained through epoxidation and a ring opening reaction. Different chemical structures of the bio-polyols resulted from the use of 1-hexanol and 1,6-hexanediol as opening agents. The bio-polyols were characterized by hydroxyl values of 104 and 250 mgKOH/g and viscosities of 643 and 5128 mPa·s, respectively. Next, the influence of the bio-polyols on the foaming process of PUR systems as well as the foam properties was evaluated. The bio-foams modified with different contents of the bio-polyols were next compared with a reference foam obtained using a polyether petrochemical polyol. The effect of the apparent density reduction as a result of replacing the petrochemical polyol was minimized by decreasing the water content in the formulation. It was found that the modification of the recipe by changing the content of water, acting as a chemical foaming agent, did not affect the foaming process. However, the introduction of the bio-polyols mixture limited the reactivity of the systems by reducing the maximum temperature of the foaming process. The bio-materials with comparable apparent densities to that of the reference material were characterized by similar values of the thermal conductivity coefficient and a decrease in their mechanical strengths. A deterioration of mechanical properties was caused by the plasticization of the polyurethane matrices with the bio-polyols containing dangling chains. However, all materials were dimensionally stable at room temperature.
- Record ID
- CUT320b0b05ba534a6e89773ea96f8d8786
- Publication categories
- ;
- Author
- Journal series
- Polymers, ISSN , e-ISSN 2073-4360, Biweekly
- Issue year
- 2021
- Vol
- 13
- No
- 15
- Pages
- [1-10]
- Article number
- 2469
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 9-10; Bibliografia (liczba pozycji) - 28; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 13, Iss. 15, Spec. Iss.
- Substantive notes
- Special Issue: Sustainable Development of Polymer Composites and Nanocomposites: Recent Advances and Future Perspective
- Keywords in English
- bio-polyols, foaming process, bio-foams, physical-mechanical properties
- DOI
- DOI:10.3390/polym13152469 Opening in a new tab
- URL
- https://www.mdpi.com/2073-4360/13/15/2469 Opening in a new tab
- Related project
- Rozwój biomateriałów modyfikowanych nanokrystaliczną celulozą do zastosowań termoizolacyjnych w niskich temperaturach. . Project leader at PK: , ,
Projects financed by NCRD [Projekty finansowane przez NCBiR (NCBR (] - Language
- eng (en) English
- License
- Score (nominal)
- 100
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT320b0b05ba534a6e89773ea96f8d8786/
- URN
urn:pkr-prod:CUT320b0b05ba534a6e89773ea96f8d8786
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.