Preparation method of TPU/POE alloy

The invention belongs to the technical field of polymer alloy materials, and particularly relates to a preparation method of TPU/POE alloy. The preparation method of the TPU/POE alloy comprises the following steps: (1) mixing polyol, isocyanate, a chain extender and a functional aid, adding the mixture into a first-section screw extruder, and carrying out shearing blending and melting reaction to obtain OH-terminated TPU; (2) continuing to introduce the OH-terminated TPU into the second-section screw extruder, adding maleic anhydride grafted POE into the front section of the second-section screw extruder to obtain a TPU/POE alloy in a molten state, and carrying out underwater pelletizing, cooling and drying to obtain TPU/POE alloy particles. According to the invention, uniform dispersion of TPU and POE is realized, and optimal performance of the alloy is realized by forming an optimal "island" structure. 本发明属于高分子合金材料技术领域，具体涉及一种TPU/POE合金的制备方法。所述TPU/POE合金的制备方法，包括以下步骤：(1)将多元醇、异氰酸酯、扩链剂、功能助剂混合后，加入第一段螺杆挤出机中，经过剪切共混并