Study mechanical properties of polyurethane foam coated by chitosan reinforced calcium carbonate with temperature curing variation

Polyurethane foam has a major function in the world of manufacturing, and one of its functions as a headliner in cars. The addition of calcium carbonate to the chitosan-based polyurethane coating matrix aims to increase strength but still has elongation as the main requirement for headliner products. The addition of chitosan is here to give a coating effect that can increase the rigidity. Several researchers have conducted research with chitosan coating on this polyurethane foam but the headliner characteristics are still not sufficient, so additional properties are needed to add strength to the headliner. At this time, research was carried out consisting of making flexible foam mixed with 4 gr chitosan and 0.2 gr Calcium Carbonate (CaCO3) in 100 ml of 5% acetic acid (CH3COOH) solution with dip coating technique and using a vacuum oven. The sample used is foam density 16 kg/m3 and given with variable temperature and curing time. Based on the results obtained, a sample with a temperature of 100°C for 120 minutes is the best result. Samples of PU foam with a mixture of CaCO3 coated with chitosan have the ultimate tensile strength (UTS) and better elongation results than PU virgin foam. Likewise with the results of its chemical composition can be seen through FTIR.