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Application of Chain Extenders in Biodegradable Plastics

 Last Update: 2022-08-25
 Source: Internet
 Author: User

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epoxy laminating resin

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Biodegradable materials PLA and PBS, due to their poor ester group stability, are easily degraded under damp heat and shear conditions to generate more -COOH and -OH, and high concentration of end groups can further promote the degradation, as follows for PLA and PBS chemical molecular formula

PLA

PBS

In order to efficiently cap the polyester end group, prevent further degradation caused by the active end group, and at the same time increase the molecular chain, it is necessary to add a chain extender.

In summary, the role of chain extenders is as follows:

●Increase the molecular weight, increase the melt strength and viscosity, improve the mechanical properties of the material, and improve the processing stability and mechanical properties of the returned material

● Improve the compatibility between different polycondensate materials

●

● Improved stability to hydrolysis

●

● Improve the processing stability of re-granulated and reused materials

●

● Improve melt strength and increase the productivity of film blowing

●

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