Petrochemical polymers are predominantly used in the polymer fiber market. If the petrochemical polymers market is considered, around 109 million tons were produced in 2020 alone. The synthetic polymers with 62% and polyester (PET) alone with approximately 52% dominate the market1. Nowadays, the end-of-life scenario is becoming more and more critical due to the rethinking of consumers. Recycling is often impossible without considerable effort due to the recyclate that can often not be separated according to type. Furthermore, incineration of the plastics leads, among other things, to a considerable CO_2 load or too complex and cost-intensive exhaust gas cleaning 2. With these facts in mind, biological degradation is becoming more and more important as an additional alternative, as well as an opportunity to handle the improperly discarded plastic that ends up in the environment. Since most petrochemical polymers are not biodegradable, the alternative biopoly-mer market is growing steadily. If Figure 1 is considered, polymers can be divided into dif-ferent origins and degradability.
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