This study uses chitin as a filler for a polyurethane composite foam. The obtained polymer composite materials (PCM) are examined the technological parameters of the foaming (start time, rise time, and apparent density), the physical-mechanical properties (the compressive stress, compression set, resilience), and the cross-link density. | Cite this paper Vietnam J. Chem. 2023 61 S3 43-50 Research Article DOI The effect of adding chitin on the physical-mechanical properties of polyurethane foam Tran Y Doan Trang1 Zenitova Ta Thi Huong1 Do Thi Hanh3 Ha Thi Dung3 Mac The Vinh3 1 HaUI Institute of Technology HIT Hanoi University of Industry HaUI 298 Cau Dien Minh Khai Bac Tu Liem Hanoi 10000 Viet Nam 2 Department of Synthetic Rubber Technology Kazan National Research Technological University 68 Karla Marksa Kazan Tatarstan 420015 Russian 3 Department of Chemical Technology Hanoi University of Industry HaUI 54 Tay Tuu Bac Tu Liem Hanoi 10000 Viet Nam Submitted 18 February 2023 Revised April 24 2023 Accepted May 19 2023 Abstract This study uses chitin as a filler for a polyurethane composite foam. The obtained polymer composite materials PCM are examined the technological parameters of the foaming start time rise time and apparent density the physical-mechanical properties the compressive stress compression set resilience and the cross-link density. The results present that the chitin-containing PCM with a filler ratio of 10 has no significant difference in the technological parameters of the foaming and the physical-mechanical properties. However the physical-mechanical properties of elastic polyurethane foam PUF -chitin materials tend to change less than the semi-rigid PCMs. Furthermore the cross-link density of obtained PCMs is increased compared with the blank PUFs due to an increase in the number of bonds between components in the polymer chain. Scanning electron microscopy analysis showed that the PCM with the filling has a larger pore size and a number of closed cells and the pore s surface is rougher than the blank PUF. Waste-containing PCMs are developed to reduce the amount of solid waste in the environment. As a result these PCMs became denser and stronger while reducing their elasticity and becoming heavier. Thus the process of synthesis of chitin-containing PCM .
