| abstract |
A method for preparing degradable TPU based on recycled PET, comprising: in the first stage, hydrolyzing PET; in the second stage, preparing high molecular diol; and in the third stage, preparing degradable TPU. The degradable TPU formed by the preparation method of the present invention has good degradation performance, is beneficial to environmental protection, and has good basic physical properties, can be applied to high-end products, and has a wide range of applications, and at the same time, acid hydrolysis and alkali are not used when recycling PET. Hydrolysis, alcoholysis and other methods, and the use of high-temperature deionization hydrolysis, avoids environmental protection problems in the production process, and does not require the use of petrochemical raw materials to cause waste. |