Polyurethane foam containing liquid crystal structural unit as well as preparation method and application of polyurethane foam

The invention provides polyurethane foam containing a liquid crystal structural unit as well as a preparation method and application of the polyurethane foam. The preparation method of the foam comprises the following steps: mixing the polyurethane polyol resin component and the polyurethane isocyanate curing agent component which are respectively prepared according to the weight ratio of 1: (1.0-2.1), uniformly stirring, pouring into a mold for molding, demolding after curing, and curing to obtain the polyurethane foam. The prepared polyurethane foam has high mechanical strength, high damp-heat aging resistance and high damping property, when the polyurethane foam is used for a buffer of an elevator shaft pit, the requirements for polyurethane buffers in new editions GB/7588-2020, TSG T-7007 and EN81-20/50 can be met at the same time, and on the basis of an existing product, the production cost is reduced, and the production efficiency is improved. The service life of the buffer at the bottom of the elevator