Rigid Polyurethane Foams with Various Isocyanate Indices Based on Polyols from Rapeseed Oil and Waste PET

Polymers

Arnis Abolins¹  Irina Sevastyanova¹  Mikelis Kirpluks¹  Ugis Cabulis¹  Aiga Ivdre¹  Remo Merijs-Meri² 

[1] Latvian State Institute of Wood Chemistry, Polymer Laboratory, 27 Dzerbenes St., LV-1006, Riga, Latvia;Riga Technical University, Institute of Polymer Materials, 3/7 Paula Valdena St., LV-1048, Riga, Latvia;

关键词: rigid polyurethane foams;    bio-based polyols;    renewable materials;    thermal conductivity;    dimensional stability;    isocyanate index;   

DOI  :  10.3390/polym12040738

来源: DOAJ

【 摘 要 】

Developing polyols derived from natural sources and recycling materials attracts great interest for use in replacing petroleum-based polyols in polyurethane production. In this study, rigid polyurethane (PUR) foams with various isocyanate indices were obtained from polyols based on rapeseed oil and polyethylene terephthalate (RO/PET). The various properties of the prepared PUR foams were investigated, and the effect of the isocyanate index was evaluated. The closed-cell content and water absorption were not impacted by the change of the isocyanate index. The most significant effect of increasing the isocyanate index was on the dimensional stability of the resulting foams. This is due to the increased crosslink density, as evidenced by the increased formation of isocyanurate and increase of the glass transition temperature. Additionally, the influence on compression strength, modulus, and long-term thermal conductivity were evaluated and compared with reference PUR foams from commercially available polyols. Rigid PUR foams from RO/PET polyol were found to be competitive with reference materials and could be used as thermal insulation material.

【 授权许可】

Unknown