Study on the mechanical properties and flame retardancy of tannic acid-based non-isocyanate rigid polyurethane foam according to the content of crosslinking agents
Year: 2025
Type: article
Abstract: Study on non-isocyanate polyurethane (NIPU) has been gaining attention as an environmentally friendly alternative to conventional polyurethane. However, current non-isocyanate polyurethane foams (NIPUFs) face limitations in practical applications due to its low mechanical strength and limited flame retardancy. In this study, tannic acid-based non-isocyanate polyurethane resins were synthesized using tannic acid with good chemical reactivity and flame retardancy as precursors. Tannic acid-based non-isocyanate rigid polyurethane foam (T-NIPUF) was then prepared using hexamethylenetetramine, citric acid, and glutaraldehyde as crosslinking agents. The structure of the synthesized T-NIPUF was analyzed using FT-IR and 1H NMR, and the mechanical properties and flame retardancy according to the various crosslinking agent contents were evaluated by UTM, SEM, TGA, LOI, and ignition tests.
Authors: Sung Yeol Lim, Su Bin Park, Min Seok Kim, Sang-Bum Kim
Institution: Kyonggi University
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414556835