Affiliation:
1. Institute for Mechanics of Materials, University of Latvia, 3 Jelgavas St., LV-1004 Riga, Latvia
2. Latvian State Institute of Wood Chemistry, 27 Dzerbenes St., LV-1006 Riga, Latvia
Abstract
The characteristics of rigid, nanoclay-filled, medium-density NEOpolyol-380 polyurethane foams components can be estimated when two conditions are met: (1) the foam blocks are produced in a sealed mould; and (2) the mass of the reacting mixture is kept constant. It was shown that, with an increase in filler concentration, the total mass of the filled polymeric network stays constant, but the total volume reduces; the higher the ratio of density of the exfoliated nanoclay platelets and polymer, the higher the volume reduction of the polymeric network. Experimental data of polyurethane foam block mass were acquired at concentrations η = 0%, 0.25%, 0.5%, 1%, 2%, 3% and 5% from the mass of a filled reacting mixture. Foam-density dependence in the uniform zone and in the side-sections of the produced blocks on the: (1) mass of the blocks; and (2) the concentration of the filler was analysed. The study demonstrated that the correlation of the specimens’ density with the foam block mass is much higher than that of the filler concentration.
Funder
Latvian Council of Science
Subject
Polymers and Plastics,General Chemistry
Reference33 articles.
1. Klempner, D., and Frisch, K.C. (1991). Handbook of Polymeric Foams and Foam Technology, Hanser Publishers.
2. Gama, N.V., Ferreira, A., and Barros-Timmons, A. (2018). Polyurethane Foams: Past, Present, and Future. Materials, 11.
3. Kirpļuks, M. (2020). Development of Renewable Feedstock Based Rigid Polyurethane Foam and Nanoclay Composites. [Ph.D. Thesis, Riga Technical University]. Available online: https://ortus.rtu.lv/science/en/publications/31088.
4. Hasanzadeh, R., and Azdast, T. (2022). Innovative Applications of Polymeric Foams Materials. Materials, 15.
5. Wang, J., Zhang, C., Deng, Y., and Zhang, P. (2022). A Review of Research on the Effect of Temperature on the Properties of Polyurethane Foams. Polymers, 14.