RIGID POLYURETHANE COMPOSITE FOAM PHYSICAL AND MECHANICAL PROPERTIES OF HYBRID REINFORCED

The physical and mechanical properties of hybrid reinforced rigid polyurethane composite foam were investigated with reinforcing agents of SiO₂ particle and fibre. The effect of content of SiO₂ and fibre on the properties of the PU composite foam was emphatically analysed, as well as the effect of length of fibre on its properties. The experiment results show that the tensile strength of the PU composite foam is optimal when the content of SiO₂ is 20 wt% and the content of glass fibre is 7.8 wt%. The reinforcing effects of glass fibre, Nylon66 fibre and PAN-based carbon fibre were compared. The result shows that the tensile strength of the PU composite foam reinforced with 3 wt%~5 wt% carbon fibre is optimal.