| abstract |
Disclosed in the present invention are a polyvinyl alcohol (PVA)-based degradable plastic, a preparation method therefor and application thereof, and a recycling method therefor. The preparation method comprises the following steps: a PVA solution is subjected to a chemical grafting reaction under an acidic condition under the action of a modifier; there are a phenyl group, an aldehyde group, and at least one group capable of forming a hydrogen bond with PVA in a structural formula of the modifier. The polyvinyl alcohol-based degradable plastic provided in the present invention has the advantages of being high in transparency, high in mechanical strength, not affected by environmental humidity, easy to degrade, good in thermal stability and good in biocompatibility, and has the advantages of recyclability, low costs, easy large-scale preparation and the like. |