A kind of polyester elastomer film and preparation method thereof

Abstract

The invention relates to a polyester elastomer film and a preparation method thereof. The straw powder, an acid catalyst and a polyol liquefaction agent are liquefied at 100-150°C for 90-130 minutes, and the reaction solution is diluted, washed and filtered, and the organic solvent is removed to obtain Straw liquefaction; under nitrogen atmosphere, mix 3~8 parts of straw liquefaction, catalyst and 8~12 parts of isocyanate at a temperature of 60~100°C for 2~5 h, add 4~6 polyester diol, continue After reacting for 3-6 hours, the casting solution was obtained, and the casting solution was spread and solidified to obtain a polyester elastomer film. The invention uses the liquefied straw as a crosslinking agent to improve the mechanical performance, thermal performance and ultraviolet absorption performance of the polyester elastomer film, which can be degraded and expands the application range of biomass liquefaction.

Description

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a polyester elastomer film and a preparation method thereof. Background technique

[0002] Almost all polymers produced and used in the market are non-degradable petroleum-based polymer materials. In order to alleviate the depletion of petrochemical resources and the negative impact of petroleum-based polymers on the environment, it is urgent to develop renewable and degradable bio-based polymers. material. According to statistics, about 840 million tons of crop straw waste is produced every year across the country, and most of them are piled up in the fields to rot on their own, causing waste of resources and environmental pollution. The woody biomass is converted into low molecular weight polyols through liquefaction technology, combined with the multifunctional groups of the woody biomass itself and the liquefaction solvent, the liquid product rich in hydroxyl can...

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