Factors affecting the performance of degradable materials

Biodegradable tableware is the development direction of tableware in the future, and the important technical point is the degradation performance. There are many factors that affect the degradation performance of materials, specifically as follows:

The effect of ph on the degradation of polymer materials

The change of pH value has a great influence on the hydrolysis rate of the copolymer chain, but the degradation rate does not differ greatly in different parts of the organism. The degradation of the copolymer can form an acidic microenvironment, which promotes the self-degradation of the copolymer. catalytic.

The influence of temperature on the degradation of polymer materials

In the experiment, it is rare to see the relationship between the degradation of the material and the temperature. This is because in vitro experiments are often carried out by simulating body temperature, and the human body temperature does not change much. However, in the process of in vitro experiments, sometimes for For the needs of the experiment, the temperature can be increased appropriately to shorten the experiment period, but the temperature should not be too high or too low during the accelerated degradation process, because the polymer will have side reactions when the temperature is too high, and the acceleration cannot be achieved when the temperature is too low. The purpose of degradation, therefore, in order to avoid the impact of temperature and air flow on the degradable materials, the degradable materials are stored in a low-temperature sealed environment.

The influence of molecular weight on the degradation of polymer materials

The hydrolysis rate of the material changes significantly due to the molecular weight and distribution of the copolymer. This is mainly because each ester bond may be hydrolyzed, and the hydrolysis of the ester bond on the molecular chain is irregular, and the longer the polymer molecular chain , The more parts it can be hydrolyzed, the faster and faster it degrades.

The influence of material structure on the degradation of polymer materials

Acid anhydrides and orthoesters are easy to hydrolyze. Since the quality and molecular weight of the comb copolymers decrease rapidly, it is due to the polarity of the skeleton, which is conducive to the breaking of ester bonds. Therefore, the degradation rate of comb molecular copolymers is higher than that of linear molecules.

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