Intra-molecular cross-linking polymer, preparation method thereof and application thereof

The invention discloses an intra-molecular cross-linking polymer, a preparation method and application thereof. The invention provides the preparation method for the intra-molecular cross-linking polymer, and comprises the following steps: performing intra-molecular cross-linking reaction on polymer under gamma-ray irradiation in a polar organic solution, thereby obtaining the intra-molecular cross-linking polymer; a ratio of degradation radiation chemical yield of the polymer to cross-linking radiation chemical yield of the polymer is smaller than 1.00; and the polymer and the polar organic solution form an uniform-phase solution. The invention further provides the intra-molecular cross-linking polymer prepared by the preparation method, and the intra-molecular cross-linking polymer has low viscosity and great surface area characteristic, the intra-molecular cross-linking polymer can be used as an additive of paint and a binder, filler and pigments of a reinforcing material, carriersof medical and biological